Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c70002554348e2…

MALICIOUS

PDF

38.9 KB Created: 2020-08-28 10:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cb7e46bab6a3627a0ff740e45a8dfca SHA-1: a0726b3233f2ee3fc73ba92579f259c0e43d36a3 SHA-256: 06c70002554348e24d9eb4f9829c0df722fbf021569883eadba10dda6f844c41
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector. This suggests a link farm or SEO manipulation tactic to obscure malicious activity. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector and link farm attack pattern.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=unturned+metal+wall+id
    • http://gikasoka.paperandpurlgurl.com/uploads/1/3/1/3/131380429/2194571.pdf
    • http://dupewo.coonleysclasses.com/uploads/1/3/2/7/132710507/2624034.pdf
    • http://files.evansadopt.com/uploads/1/3/0/7/130738753/dirigefufusode.pdf
    • http://wekurut.versewrights.com/uploads/1/3/0/8/130874493/mexuj_nemutadelekili.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4555/9189/files/fuvoludivozarowujufew.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/bilijobuzejodudigexas.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2769/files/doxomopozadu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2636/6116/files/residential_lease_agreement_template_nsw.pdf
    • https://cdn.shopify.com/s/files/1/0428/2449/9367/files/bodorukabetevajof.pdf
    • https://cdn.shopify.com/s/files/1/0433/6313/9733/files/tonobotukusinivevinofe.pdf
    • https://cdn.shopify.com/s/files/1/0443/8127/4278/files/58430046111.pdf
    • https://cdn.shopify.com/s/files/1/0432/0627/9332/files/sheetrock_vs_gypsum.pdf
    • https://cdn.shopify.com/s/files/1/0430/3775/3501/files/kawaparami.pdf
    • https://cdn.shopify.com/s/files/1/0429/7578/9215/files/3908758338.pdf
    • https://cdn.shopify.com/s/files/1/0431/8091/6893/files/basic_accounting_notes_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0789/files/7172549205.pdf
    • https://cdn.shopify.com/s/files/1/0433/2650/5118/files/gumemomonome.pdf
    • https://cdn.shopify.com/s/files/1/0449/3488/9627/files/epiderme_derme_hipoderme.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b2e.bin
01a325276a658611256d4cc7512b9c91ff254d5b3d7380f4cf65e2f4d2bd1c49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2E 4876 bytes
font_01_sfnt_off00006bb8.bin
31e1b04a9f7b8793120f8aedd79f1f19b6e2951d4ad5d7d0f42a8fb1d7352624		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB8 10280 bytes

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