Malicious PDF — malware analysis report

Static analysis result for SHA-256 479b059f73d9abd5…

MALICIOUS

PDF

36.6 KB Created: 2020-08-14 02:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 392f073fa3efa9e62c748a33bde803e3 SHA-1: 25ee4fbd3b1772044a6cf31b960d046e73234f2e SHA-256: 479b059f73d9abd54b57c2c79eee4a9c22223351c673e04acc196cee7411a244
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector and a link farm. The primary malicious URL identified is https://ttraff.com/pify?keyword=chore+chore+mastuto+bhai+movie+hd, which is likely used to redirect users to further malicious content. The document body itself is heavily obfuscated and contains a mix of seemingly random text and URLs, further supporting the 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=chore+chore+mastuto+bhai+movie+hd
    • http://zemejezuj.katehaleycivilcelebrant.com/uploads/1/3/0/9/130969054/690571ca4ceedbb.pdf
    • http://files.blindsanddecors.com/uploads/1/3/0/8/130874360/ninuvitijer_zeviti_vonijulomakug_vadujemivil.pdf
    • http://files.beasleydoodles.net/uploads/1/3/0/8/130813781/vixosamitizozaf.pdf
    • http://files.positivegundogsmn.com/uploads/1/3/1/3/131380471/9407882.pdf
    • http://files.firefighterrescuesurvey.com/uploads/1/3/0/8/130814644/acb387e833b8.pdf
    • https://cdn.shopify.com/s/files/1/0433/7732/8286/files/87590750478.pdf
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/78553739863.pdf
    • https://cdn.shopify.com/s/files/1/0436/1977/8720/files/probability_worksheets_7th_grade_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/vozalipun.pdf
    • https://cdn.shopify.com/s/files/1/0437/9289/2053/files/pivusir.pdf
    • https://cdn.shopify.com/s/files/1/0435/8438/9275/files/sexosa.pdf
    • https://cdn.shopify.com/s/files/1/0436/6965/1606/files/4491800158.pdf
    • https://cdn.shopify.com/s/files/1/0444/5070/9671/files/fafsa_student_loan_deferment_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4447/files/42798509038.pdf
    • https://cdn.shopify.com/s/files/1/0434/2985/5393/files/brachial_plexus_injury_treatment_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/35076523053.pdf
    • https://cdn.shopify.com/s/files/1/0438/0616/3105/files/needle_bearing_size_chart.pdf
    • https://cdn.shopify.com/s/files/1/0437/2050/7544/files/albert_camus_plays.pdf
    • https://cdn.shopify.com/s/files/1/0430/6993/1673/files/kudakogukobozujado.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/
    • https://cdn.shopify.com/s/files/1/0437/2050/7544

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000521a.bin
e86a387714169f72343b8cb7afd23d6608c712c600f3556f842e11a02ffae115		 pdf-font-stream PDF embedded font (sfnt) at offset 0x521A 5252 bytes
font_01_sfnt_off000063cb.bin
e3d7615f02533a542063dde486572404f81a5d120465dc615dbf3832e8f7ab36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63CB 9772 bytes

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