Malicious PDF — malware analysis report

Static analysis result for SHA-256 d72350cd215a2e60…

MALICIOUS

PDF

41.9 KB Created: 2020-08-18 17:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 62916bfde029827650672b768b494b2d SHA-1: 9ee9361d38e955cf419093773f83d100ef428381 SHA-256: d72350cd215a2e60e1e24e9d60ad04f29e47f5cd72c2b9ab5ecbad26ef8c4d61
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector. The primary malicious URL, 'https://ttraff.ru/pify?keyword=poesias+cecilia+meireles+pdf', is directly linked to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to the poetry content and the malicious URL, suggesting a lure to drive traffic to malicious sites. The file was generated using wkhtmltopdf, a tool often abused for creating malicious PDFs.

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=poesias+cecilia+meireles+pdf In PDF document text
    • http://files.raggedmountainrunning.com/uploads/1/3/0/7/130776273/3ef5718.pdfIn PDF document text
    • http://files.cecilyscloset.org/uploads/1/3/1/6/131607063/rusas.pdfIn PDF document text
    • http://files.billiamscafe.com/uploads/1/3/2/6/132696598/5886895.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/1/0440/2036/7510/files/3962184233.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/govaxilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0053/6986/files/57407576684.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3748/1365/files/xonarelivijira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1625/5650/files/14446841451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/2878/7878/files/bosch_security_keypad_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5863/3627/files/blank_abn_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/deturo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0826/6137/files/alphabtisation_des_adultes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5685/6230/files/sixesitodisewujola.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_off00006611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6611 5300 bytes
SHA-256: 0981ec460a0d190c70cb00a06ff624456cb36c9fcf5b326c88d1c408b09920b6
font_01_sfnt_off000077fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77FB 10156 bytes
SHA-256: e1d74e0a0bd753a7dc4c68213f396e9298f90b045365fe2b01f371f1c1038b17

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