Malicious PDF — malware analysis report

Static analysis result for SHA-256 df18a8575265c04c…

MALICIOUS

PDF

50.1 KB Created: 2020-08-20 20:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e898744fcb23ab8d4760d6607a6a0704 SHA-1: 87899a0d362c7338895a1a99eabbc436cc383a84 SHA-256: df18a8575265c04c7f1993323c8dba8ec530ebdfe2dac3edbee4d3ad5572d856
194 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=chicken+invaders+4+mod+apk'. This URL is likely used to redirect users to a malicious download. The document also contains a PDF link farm, with many links pointing to Shopify domains, likely to improve search engine ranking for the lure. The ML classifier also strongly flagged this PDF as malicious.

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=chicken+invaders+4+mod+apk In PDF document text
    • http://files.empathies2017.com/uploads/1/3/1/6/131607010/guzaxonibexadave.pdfIn PDF document text
    • http://files.shopisadoraboutique.com/uploads/1/3/1/6/131636923/kepakoniw.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/1/0428/0382/2755/files/alter_ego_plus_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8896/0919/files/17019378076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/pizabamijapenuxofapojelel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/56528206995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6193/6290/files/43809045786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/82702445498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/gurutulosifinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6982/files/mevekokekovokanigol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3874/4469/files/progress_report_comments_for_weak_students.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0761/4882/files/fenufuj.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00009ffa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9FFA 17688 bytes
SHA-256: 4a36b87d978dfb604467e002672749576881ceabca52b3e60f81687a11672a9d
font_00_sfnt_off00005e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4B 2880 bytes
SHA-256: 619a44e8b5c2a2d3fc0e18259d8022938ad4f8b30552901bc68dc41c3d0f2ef0
font_01_sfnt_off00006889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6889 5400 bytes
SHA-256: ce48465fe7e7faee7c1ea0c389461960e997194c16b46a78842d6dccb6862a9b
font_02_sfnt_off00007ab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB4 11112 bytes
SHA-256: 5f05852139b9670066329899087063934a65b854ff22c13f23f62aeb30367456

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