Malicious PDF — malware analysis report

Static analysis result for SHA-256 a728ed50c4e2bbf8…

MALICIOUS

PDF

44.8 KB Created: 2020-08-19 20:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7f1927a3149b09a3e5c27b4c79a4010d SHA-1: 5182a22c898d1bec6b22246731d2a48c268c7556 SHA-256: a728ed50c4e2bbf82d585ee0e83bae746baec41d4e74baa29a456689af556b4d
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=arista+7130l+datasheet'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains references to the Arista 7130l datasheet and the wkhtmltopdf tool, suggesting a lure to disguise malicious links as technical documentation. The primary intent appears to be redirecting users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PHP webshell / backdoor source high WEBSHELL_PHP
    The file contains PHP server-side code with the signature of a webshell/backdoor (request input fed to a command/code-exec sink). A webshell takes attacker input from an HTTP request and runs commands/code on the server. Flagged as a malicious hacktool artifact even when carried inside a document or archive — the code does not execute from the carrier, but the file is a webshell.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=arista+7130l+datasheet In PDF document text
    • http://xelawu.newenglandpowerlight.com/uploads/1/3/0/8/130814515/8d3bdac.pdfIn PDF document text
    • http://files.gateways2heritage.com/uploads/1/3/1/4/131453512/xavupanepujutirulad.pdfIn PDF document text
    • http://files.makinghairsmile.com/uploads/1/3/0/8/130874295/430d047785a70c2.pdfIn PDF document text
    • http://files.rhapsodyartbarn.com/uploads/1/3/2/7/132740515/dowanomexil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9707/9460/files/46330610304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3406/6600/files/gidejawuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8948/4189/files/gabuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4030/9402/files/75088610199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2068/1377/files/dodopepirozadazudibazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7469/0965/files/damizajumama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5063/1319/files/perform_an_http_post.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9691/5616/files/kukositagotokuxikoju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/gezasuvajivugoberasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/5507737707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8981/1861/files/lexis_audio_editor_free_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5272/0543/files/anticuerpos_antinucleares_valores.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6924/2534/files/lagu_tanah_air_versi_alffy_rev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/77823110811.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB1 5340 bytes
SHA-256: 544fe4a6bfe30bb63daa3ce1f964ffa05428359e1befa7e18d6441ab76f45e38
font_01_sfnt_off000081cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81CD 10740 bytes
SHA-256: 6a85619aa9c89824b947f3c3d4258963f9151e8885903365d761dec6ee98b261