Malicious PDF — malware analysis report

Static analysis result for SHA-256 553b8c5983d98506…

MALICIOUS

PDF

50.9 KB Created: 2020-08-04 20:19:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a95ef962d375b3461920ac3b26bd5e06 SHA-1: 708a844884a6afb18192d9dbb3d86dc1871adf89 SHA-256: 553b8c5983d98506818e88d5b1cae1a4f2eb8a9303d3fb53599446a39daabc4a
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This indicates the document is designed to lure users to a potentially harmful website. Additionally, a large number of embedded links were found, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic to obscure the malicious redirect. 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.com/pify?keyword=ejemplo+de+un+anteproyecto+de+investigacion+pdf In PDF document text
    • http://files.fryeins.com/uploads/1/3/1/3/131398347/8898428.pdfIn PDF document text
    • http://files.claycountyhistoricalsocietyin.org/uploads/1/3/1/3/131380251/sivugeg.pdfIn PDF document text
    • http://files.quillandpapercalligraphy.com/uploads/1/3/0/7/130776225/fopafosumabilino.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/1/0427/6856/4380/files/nufusawazopadedur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3064/1826/files/52581397858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/averitt_bol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4302/7104/files/23552396316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/godikuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5180/3039/files/pitejefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9853/8151/files/31018514233.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9137/6794/files/zewuzaledaveselomasarisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2949/4933/files/zanugapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/simisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1392/1189/files/wasatch_softrip_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/11503132568.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_off000081ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81AD 5668 bytes
SHA-256: 4e70a6dbd47933799c5f50a6ca88502f57223b1411ec743faa45d0b3dcb36662
font_01_sfnt_off000094fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94FB 12276 bytes
SHA-256: 497298453c24c20d6f7e25858a29e1e09b2c9b11736dc54ee7449c230af350ca

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