Malicious PDF — malware analysis report

Static analysis result for SHA-256 78322e4011e1fbf2…

MALICIOUS

PDF

48.1 KB Created: 2020-08-07 18:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1177c8631ceb64e31f9bd5b1a0ba5657 SHA-1: 09b4c3aadc1bbf98472a1ae7c31e7e0943d5381d SHA-256: 78322e4011e1fbf23c1e798cc807480b94828f11dbde1c9bd754da5892cb872d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits malicious behavior by linking to a redirector service, which in turn leads to a large collection of other PDF files hosted on Shopify. The primary redirector URL, 'https://ttraff.cc/pify?keyword=evento+cerebrovascular+isquemico+y+hemorragico+pdf', is flagged as malicious. The document body contains obfuscated text and embedded URLs, suggesting an attempt to disguise its malicious intent and leverage SEO tactics for distribution. The ML classifier strongly supports the malicious verdict.

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=evento+cerebrovascular+isquemico+y+hemorragico+pdf In PDF document text
    • http://files.judithmary.com/uploads/1/3/0/9/130970001/4277096.pdfIn PDF document text
    • http://files.nrareservations.com/uploads/1/3/1/8/131871850/d1c165b2f16.pdfIn PDF document text
    • http://xatas.gitaarlesdamwoude.nl/uploads/1/3/1/6/131606490/a611d04b.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/1/0433/6277/9295/files/zidanerobetavigolim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1827/2423/files/mw3_mod_xbox_360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2476/1507/files/92719424616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/lilitujijonuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7227/5103/files/sijusu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/mawaxoguwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0708/1622/files/string_to_int_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/dojamisapik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0917/1879/files/guxokelamolela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/oblicza_geografii_atmosfera_sprawdzian.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/93500959477.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 4

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_off0000756b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x756B 5952 bytes
SHA-256: 6e130dabec0d78e8caa6fe44cf400ab74414cefcabc4022533b3737b3f9cf212
font_01_sfnt_off0000898b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x898B 13056 bytes
SHA-256: 76ec1c8f53f172dcd36118362edf36b284c7c91c5c0162be5bb048b3ed9d8a2c

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