Malicious PDF — malware analysis report

Static analysis result for SHA-256 02601e6fb2dfb639…

MALICIOUS

PDF

42.4 KB Created: 2020-08-22 11:24:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9abfbe19e7576923f926021382a7cde SHA-1: 2cc6f39b57eb776116f18ceb75fd772016b9d80c SHA-256: 02601e6fb2dfb63982e42988b48eccdca4b10a6f3d140a88bcb733a41e203bac
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the malicious URL, suggesting an attempt to disguise or obfuscate the malicious intent. The presence of numerous Shopify links, some confirmed benign and others unknown, suggests a link farm or SEO manipulation tactic.

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=bottomnavigationview+android+developer
    • http://files.simplelifecitywife.com/uploads/1/3/1/4/131406849/bofibuvilugapa_bametogaf_tasivod.pdf
    • http://files.thierryrmontoya.com/uploads/1/3/2/7/132740564/4624632.pdf
    • http://files.darbycreekpto.com/uploads/1/3/1/6/131636692/7710588.pdf
    • http://rumetor.interporcspain.org/uploads/1/3/0/9/130969060/05217a59e254b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8661/7501/files/barreras_para_la_comunicacion_eficaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/5004/8420/files/wow_classic_mage_leveling_guide_1-_20.pdf
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/efca_statement_of_faith.pdf
    • https://cdn.shopify.com/s/files/1/0430/2775/9257/files/zudobujekuvofebemogetal.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/dovunakanonexidera.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dosadibevejigavo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6177/2442/files/45807318426.pdf
    • https://cdn.shopify.com/s/files/1/0434/2513/6792/files/64135263196.pdf
    • https://cdn.shopify.com/s/files/1/0434/8071/1325/files/fuxabidojisejebasomoxenen.pdf
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/jibetarakarobu.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_off000066ec.bin
7899b5676b5a5ab08c2003fa8fca466780b261240694d40979648ba2344c40f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x66EC 5300 bytes
font_01_sfnt_off000078e9.bin
19cdf7ae572ab186982b6aa5f906b1b935ddc05a81516ed33873e2e7642e3a10
pdf-font-stream PDF embedded font (sfnt) at offset 0x78E9 10524 bytes