Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4b19f603e2fe804…

MALICIOUS

PDF

44.9 KB Created: 2020-08-09 17:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4b3d1927c49e66e6ee5428b30a6570ab SHA-1: f5438da46fb6f5f489fa8104f696b4508e5956be SHA-256: e4b19f603e2fe8043b05165b274156c85b0b60120ae6404be4153cda44f9b285
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, 'https://ttraff.cc/pify?keyword=airline+airport+codes+pdf', which is likely intended to deliver a malicious payload. The document body, though heavily obfuscated, contains references to airline airport codes, suggesting a lure to entice users to click the malicious link. The presence of numerous other PDF links further supports the SEO link farm heuristic, indicating an attempt to manipulate search engine results or distribute content widely.

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.cc/pify?keyword=airline+airport+codes+pdf In PDF document text
    • http://files.subnum.org/uploads/1/3/1/1/131163667/9952068.pdfIn PDF document text
    • http://files.jmaxey.net/uploads/1/3/0/7/130775382/suzotemuw.pdfIn PDF document text
    • http://files.dancingchickjams.com/uploads/1/3/1/4/131437474/cca693a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/zevojesolagun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4146/3204/files/26350182103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/album_title_generator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/dagevosotubikopow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5712/6295/files/27888860974.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/buzuxunatexuxapelut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/77818238935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4098/8575/files/kivipobunojokuwepog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8493/0462/files/voges.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/nekanovudexusufukirite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/62891312037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/74039562291.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000638a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638A 4928 bytes
SHA-256: 7ab29fb854917bf236ada097b0c016dc87ac8477bd742d622a814f56cafdb433
font_01_sfnt_off00007449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7449 10604 bytes
SHA-256: 28a894cd6cb2ac2ec2a02bf4b326aa16a8847039cdc6ac57f7086f59955d53ff
font_02_sfnt_off00009889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9889 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3