Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f880e8b40aa239b…

MALICIOUS

PDF

123.8 KB Created: 2020-08-13 22:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6646b1a3ed3984a1e6827750da24f94c SHA-1: f48e97228a4a24bccc28f97658fddd495768929e SHA-256: 6f880e8b40aa239b8fda4b0fd5adac9a1ca502eb21ee4ef5cfdb03ee3338ee4f
194 Risk Score

Malware Insights

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

The PDF contains a lure referencing an annual report to entice users to click on a link. This link, https://ttraff.com/pify?keyword=ackermans+van+haaren+annual+report+2016, is identified as a malicious redirector. The document also hosts a large number of external PDF links, many of which are likely part of a link farm. The ML classifier strongly flagged this PDF as malicious, and the heuristics indicate an advance-fee scam lure.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=ackermans+van+haaren+annual+report+2016
    • http://files.bringingtherapyhome.com/uploads/1/3/1/8/131871605/1feb4c7.pdf
    • http://bumozi.conleytrack.org/uploads/1/3/1/3/131380505/3701569.pdf
    • http://files.lovinghotstuff.com/uploads/1/3/1/8/131856276/fcde9d161a4d1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3518/1734/files/winzip_21._5_activation_code_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/7731/1391/files/anamnesis_clinica_psicologica.pdf
    • https://cdn.shopify.com/s/files/1/0432/3590/1602/files/tetafopawebufezazorotipir.pdf
    • https://cdn.shopify.com/s/files/1/0432/3275/5875/files/tewodurugofa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3485/3021/files/36372132704.pdf
    • https://cdn.shopify.com/s/files/1/0436/0686/8126/files/test_of_reasoning_and_mental_ability.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39720928980.pdf
    • https://cdn.shopify.com/s/files/1/0433/4364/2773/files/9386543337.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5800/files/fobazefuna.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/cacerola_de_mar.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/12_week_calisthenics_program.pdf
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/40107130315.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2636/files/atlantis_the_antediluvian_world_espaol.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_off0001a55d.bin
c6802d653247f3c69f6dcf98258f99efd6646b87429378dc0c869a513c9db3ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A55D 5768 bytes
font_01_sfnt_off0001b8d7.bin
47678dd561c7cc28ddb6716cb4e8edc8e70dffe067f4911192daa64a099c99cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B8D7 12368 bytes

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