Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d90fa54c6bb1894…

MALICIOUS

PDF

60.7 KB Created: 2020-08-09 11:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 44750046eeca5d8b72cf587ad963f30d SHA-1: c20aa17bca160c956c6050bbc6904adf8572b96c SHA-256: 5d90fa54c6bb1894ea3a305c6eaa65f9b7cec73b85d09223b5891c6ebf37492b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure related to nicotine withdrawal, but its primary function is to redirect users to a link farm. The heuristic firings indicate the PDF links to known malicious redirector infrastructure and acts as an SEO link farm, suggesting a phishing or malware distribution scheme. The ML classifier strongly supports the malicious nature of this PDF.

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=sindrome+de+abstinencia+nicotina+pdf In PDF document text
    • http://files.andychristopher.net/uploads/1/3/0/7/130740069/c1392dba46e20.pdfIn PDF document text
    • http://files.99westcustoms.com/uploads/1/3/2/6/132695915/bubilonowopefe_bezirobe.pdfIn PDF document text
    • http://files.deerogersdesigns.com/uploads/1/3/1/8/131856852/e6a6e4.pdfIn PDF document text
    • http://files.sensibleshock.com/uploads/1/3/0/8/130874097/wozodeguvezapo.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/1/0438/6324/4960/files/reduction_of_adverbial_clauses_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9832/4638/files/rekix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9970/8821/files/vewobijop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/88328701637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2657/9610/files/vejufupabiwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wurawosupamajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0827/8171/files/suxipufazisunulorojuruzoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5488/3231/files/54199033184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6379/5094/files/58142825670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1903/2987/files/6805664862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5633/9871/files/dudorimodokowo.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 8

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_off0000a9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9E2 5512 bytes
SHA-256: c5e908178531da57901b0e84a9ba512d16d6633023348c266541359915b5160c
font_01_sfnt_off0000bc7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC7E 12536 bytes
SHA-256: e76bb0be994c02a281f15aa341d5b948d430446dae24baf62ca1dd0c4777f608

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