Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d53cc80e8e767e…

MALICIOUS

PDF

46.6 KB Created: 2020-08-09 22:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 16970cf10966f495faca92eee5466f47 SHA-1: 1cf8bdb449a9cdc9958abaea445a04be09a502d0 SHA-256: e7d53cc80e8e767e1b481ddb375a8dcd260dfc113c387bba7ba254fb90257016
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.ru). The document body, though heavily obfuscated, contains text related to "adding and subtracting fractions worksheets and answers pdf", suggesting a lure to disguise the malicious intent. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a phishing or scam attempt.

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.ru/pify?keyword=adding+and+subtracting+fractions+worksheets+and+answers+pdf In PDF document text
    • http://kimatebak.bhi5.com/uploads/1/3/1/4/131408738/3796223.pdfIn PDF document text
    • http://files.stcharlespilgrimages.com/uploads/1/3/1/4/131438500/0a599d3808.pdfIn PDF document text
    • http://lipoj.sbcsocialsciences.com/uploads/1/3/0/7/130739415/6778664.pdfIn PDF document text
    • http://files.medwellnessclinic.com/uploads/1/3/1/8/131871518/e572dfe8633c97.pdfIn PDF document text
    • http://files.c2lconference.com/uploads/1/3/1/4/131453897/gugadelug_gilodajol.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/1/0431/8294/8506/files/pozafevase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2198/4166/files/98834474026.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0902/7735/files/cappella_palatina_aquisgrana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7578/7162/files/35061318781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/interferences_in_atomic_absorption_spectroscopy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1111/3123/files/type_racer_hacks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2717/6343/files/counting_worksheets_for_preschoolers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6116/4697/files/bupijomutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/68440234156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5055/5799/files/shri_suktam.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_off000076ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76CA 5672 bytes
SHA-256: deb99a88be5e6ff840a54a338314daf41c2848e760d5d4672b5d65c37d15e587
font_01_sfnt_off00008a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A26 10128 bytes
SHA-256: 65e5d3a8b3bcfb4a503c647ef5f6c7c7ef08a15f82b549710d71eb32b333989d

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