Malicious PDF — malware analysis report

Static analysis result for SHA-256 f35bf7a2535fec9d…

MALICIOUS

PDF

72.7 KB Created: 2020-09-13 22:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e62406ff725c08e8fe2306ca099e136f SHA-1: d92b68abac191263d234784a7145609521e711bf SHA-256: f35bf7a2535fec9d9a998d40d2d32015757d5a134d5f7485e60a217a473a6f88
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a link to a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The primary malicious indicator is the redirector URL, which is likely part of a phishing or malware distribution chain. No scripts were extracted, limiting the analysis of the exact payload.

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.club/pify?keyword=partes+del+pie+izquierdo In PDF document text
    • http://piwososej.robertsardello.com/uploads/1/3/0/7/130776262/5a72f2173.pdfIn PDF document text
    • http://fabap.bernielagana.com/uploads/1/3/0/7/130740368/504fd6f4c.pdfIn PDF document text
    • http://files.owossogaming.com/uploads/1/3/1/8/131871477/4522839.pdfIn PDF document text
    • http://files.lotusblossomjourneys.com/uploads/1/3/2/6/132683334/2936469.pdfIn PDF document text
    • http://mifivure.empirephilippines.com/uploads/1/3/0/8/130813042/wujuvinave_mokes_jigesozerelofu_rikuwexuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/fc840b_30c3c5d2983a4b6288987aa834638ae7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4143/8366/files/halloween_worksheets_for_fun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/4008/8740/files/12832665594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8821/4171/files/skyrim_radiant_prostitution.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ee4a13_2eb9732b146b46b9bce75621668928ee.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3e0cb9_1524508cfb5e42f09cd43516f55e74d6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6a22cb_6f33a86f1606446a8fdffa42a184fcc9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2f8cea_ff3626b0f7714804ba009b171c7caaf8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bae363_9a5190d1a44a45309911a7d93903c81d.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

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF3 5132 bytes
SHA-256: 1e04df70c670d83f03a28f047640febb05cef88bd8cec1b5d3fa46fee4b86bb1
font_01_sfnt_off0000f17e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17E 11300 bytes
SHA-256: fe4832b324fcdc7ece36a558a2f87646ed81bb3ef122f7b05438d1d74f6ffa21

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