Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f3934ea9d5fb846…

MALICIOUS

PDF

45.9 KB Created: 2020-08-08 01:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce076a0641d623c98b1ec9f011e1b6af SHA-1: 4d716526302fd9e21cc021aabac166647e611523 SHA-256: 0f3934ea9d5fb84669acdf86dca5d94dd4667a7429d37ba8d1f733128f3ddab0
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains numerous embedded URLs, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Universal credit application pdf' and includes the malicious URL, suggesting a phishing or scam lure. The presence of many PDF links, including those pointing to Shopify, indicates a potential link farm used for distributing malicious content or for SEO manipulation to increase visibility of malicious sites. 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.
  • 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.ru/wb?keyword=universal%20credit%20application%20pdf
    • http://files.mo-menshealth.com/uploads/1/3/2/8/132814935/dilewelogu.pdf
    • http://toloritun.jaxbeachlions.org/uploads/1/3/1/3/131379732/filoruj-gezezo-jupesoveloz-pilatiwuxakik.pdf
    • http://files.wordsfromtheword.com/uploads/1/3/1/6/131636957/9188569.pdf
    • http://jiwupibi.herbertpauls.com/uploads/1/3/2/6/132682883/mizeguxal.pdf
    • http://files.robertogilphoto.com/uploads/1/3/2/8/132814123/joginuboke.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/memefexodijawazarigerew.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/nobitomujarufiwibukiboguk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/dimimuwakedevakewe.pdf
    • https://cdn.shopify.com/s/files/1/0438/7130/5896/files/62341327996.pdf
    • https://cdn.shopify.com/s/files/1/0438/8628/0872/files/sejujopawuju.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/atlantic_slave_trade_test.pdf
    • https://cdn.shopify.com/s/files/1/0435/2576/7320/files/pabumatoxoros.pdf
    • https://cdn.shopify.com/s/files/1/0453/8499/0888/files/pet_bottle_blowing_machine.pdf
    • https://cdn.shopify.com/s/files/1/0434/7225/7181/files/dibisekoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7584/files/65549815172.pdf
    • https://cdn.shopify.com/s/files/1/0437/3784/1813/files/bafuxudadexumuvefurefito.pdf
    • https://cdn.shopify.com/s/files/1/0435/8933/7256/files/sample_data_analysis_in_qualitative_research.pdf
    • https://cdn.shopify.com/s/files/1/0440/7502/4549/files/felativokafunitenigaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/4601/8967/files/ledafegizomarogexer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000690f.bin
91e832bacca7d26ba76fe4be4d06e7fb0b1590d9b54771433975ec8227ad71c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x690F 4988 bytes
font_01_sfnt_off00007a0f.bin
bf0513f6742d975c7e8a96760fccd319909f7b1268d784165e1834ee742fda29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0F 10012 bytes
font_02_sfnt_off00009c46.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C46 4324 bytes

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