Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e7cdf388752327e…

MALICIOUS

PDF

51.4 KB Created: 2020-07-29 02:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6902bcf9a15e0f6c8026f8013fad7c70 SHA-1: 100425db2d52182f66a4fc37361e2a3a66679af4 SHA-256: 8e7cdf388752327e3e3bcb2ceab7ea52ac8adff638197d530302b71c73c33b76
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used to create link farms for SEO manipulation or to obscure malicious destinations. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is part of a larger link farm hosted on Shopify. The document body, though heavily obfuscated, contains text related to 'Hd wallpapers for android mobile free', suggesting a lure to attract users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.com/pify?keyword=hd+wallpapers+for+android+mobile+free In PDF document text
    • http://files.conor-ryan.com/uploads/1/3/0/7/130739116/neduzidi.pdfIn PDF document text
    • http://files.cherylannhillsartist.com/uploads/1/3/1/4/131454116/lijure-zisasedafatux-sepax-gonizev.pdfIn PDF document text
    • http://files.thethinkingnurse.com/uploads/1/3/2/7/132710717/7fc42d41af6305.pdfIn PDF document text
    • http://files.adamfranklinblues.com/uploads/1/3/2/7/132741486/dff63a895d21c.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/1/0429/5173/7498/files/12666948618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5397/2633/files/guxelibanixotusavetodijef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0921/1549/files/42303662792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/19206270537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejupabofutub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4464/2715/files/nigofugemikabexiroz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/vafawiwisibotomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/29780078567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/17395450530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2371/8824/files/voxigixonewerusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8320/9631/files/goxikekovojegimijimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/satofekefekuwozavobijogut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4152/9754/files/44579114333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4884/3934/files/duwokagivebanul.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B9 5088 bytes
SHA-256: 77afc5940d9a6d69a32084a70cd1567f8a2313074810711b3cf412f1a64fda38
font_01_sfnt_off000082e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82E8 12344 bytes
SHA-256: 4078d30adeac5eb8876d9e10958fae78e697b0b6305d530f353b9069d2a7f7ea
font_02_sfnt_off0000aa78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA78 16164 bytes
SHA-256: f469c5aa689aa4c1965481b78cfaebbf1c3ebdad2306c7067134b7b4aaa0addd