Malicious PDF — malware analysis report

Static analysis result for SHA-256 60763b924141c4a6…

MALICIOUS

PDF

43.8 KB Created: 2020-08-11 00:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e2c863d404ce1d3b6bb432ca01b0d3b SHA-1: 77165befb638b8f9bc3d362a4285809fa0e8dd4d SHA-256: 60763b924141c4a66c7eea215f43398e1424db84817d75eeb32ad907f74fd4dd
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=manual+de+biomagnetismo+medico+cleotilde+pineda+cabrera+pdf, which is flagged as malicious. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic, likely intended to drive traffic to malicious sites. No scripts were extracted, but the embedded links are sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=manual+de+biomagnetismo+medico+cleotilde+pineda+cabrera+pdf
    • http://files.kathrynbelle.com/uploads/1/3/1/8/131856331/3269062.pdf
    • http://files.gemalchemist.com/uploads/1/3/0/8/130874633/sezepexifurisitalaz.pdf
    • http://files.marycatherinestarr.com/uploads/1/3/0/7/130739856/9a9087e34cd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0444/5346/2183/files/alt_code_heart.pdf
    • https://cdn.shopify.com/s/files/1/0431/8602/8708/files/functional_strength_training_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/9003/5366/files/xifox.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/83506812491.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1460/files/dekotiregarigoxitubowogez.pdf
    • https://cdn.shopify.com/s/files/1/0438/5121/9104/files/80828037491.pdf
    • https://cdn.shopify.com/s/files/1/0437/9348/1885/files/apcob_notification_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/2771/0630/files/bimuluzuwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/wimilogekivonigiratotowi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/nataki.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/vapiwowimokuvefigerudake.pdf
    • https://cdn.shopify.com/s/files/1/0433/4724/7263/files/ampicillin_davis_drug_guide.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_off00005217.bin
8235b2cdd5126f8564ad28033ab6ef4f1c08aec6513230d824992c5ce4dcac91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5217 5620 bytes
font_01_sfnt_off00006510.bin
49658ea7931ca42d06af4dd913d5059062bb267ddb80db6ae48e0f7a9cf6e31a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6510 2456 bytes
font_02_sfnt_off00006fa8.bin
4274becaa28e8d469702a09933cd15acf72cbd2498875e5c6c7d1d6f536c5730		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA8 15396 bytes

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