Malicious PDF — malware analysis report

Static analysis result for SHA-256 a156d1f2778ac0b2…

MALICIOUS

PDF

38.4 KB Created: 2020-07-26 16:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5d2a3c838325c0f4056d0b7f50a2ccbf SHA-1: 519dc610a8bea2b8c903473b08047239040a730f SHA-256: a156d1f2778ac0b2e780e81447aa62000a0eef029ef9d26da02f73d1ad575f83
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'ttraff.cc', which is known malicious infrastructure. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one leading to 'cdn.shopify.com'. The document body, though heavily obfuscated, contains text related to 'Calvin Klein women's performance shorts', suggesting a lure to disguise the malicious intent. The primary goal appears to be redirecting users to malicious sites.

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=calvin+klein+women%2527+s+performance+shorts In PDF document text
    • http://files.leatherwise.co.nz/uploads/1/3/1/4/131413718/9fe8105.pdfIn PDF document text
    • http://files.peterandannemariehelms.com/uploads/1/3/1/3/131383607/dorexodafo_paxofugipo_sikejorukolu.pdfIn PDF document text
    • http://files.kazzrie.com/uploads/1/3/2/3/132303043/9288608.pdfIn PDF document text
    • http://files.jennifertyao.com/uploads/1/3/0/7/130740589/savozijukuz_wopejuri.pdfIn PDF document text
    • http://files.drmanuelamenendez.com/uploads/1/3/1/3/131380308/1036715.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/1/0430/7661/6353/files/xapen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8752/7078/files/90324873768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/ditowus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4473/2065/files/39635400848.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/73593952415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4161/2199/files/wewapewapol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/jodavevafanizuxami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/68769425665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/redugakanirepax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/22887900645.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85583151980.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_off000058be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58BE 5316 bytes
SHA-256: 85f10efecfd2f31d159735eb312e95b1b170dc9cd80d9f28a29724548bda32f4
font_01_sfnt_off00006abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABF 9480 bytes
SHA-256: fa184dbaaf26191a98ce6c202fcebf0a6f3dced79d7d2ff2955e724cd10c8bf5

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