Malicious PDF — malware analysis report

Static analysis result for SHA-256 08486922fea3dc79…

MALICIOUS

PDF

51.3 KB Created: 2020-08-22 16:19:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 942b942c7980d36f3e24f92a8c4db02e SHA-1: 479156b69977532d1452a95a5ac0f49c2f77f9ef SHA-256: 08486922fea3dc794d1d44c902b1ada51593d92e5095397b11a5894c4bcd0a79
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains a reference to the malicious URL. The presence of many links suggests an attempt to generate traffic or distribute further malicious content, likely via a spearphishing attachment.

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.cc/pify?keyword=skillet+comatose+album++zip
    • http://suweta.ellenitesfayephotography.com/uploads/1/3/2/6/132695384/dunumez-xokunon-giwasosob-zezusifadurut.pdf
    • http://files.birthrightlake.org/uploads/1/3/1/8/131871864/dutapo.pdf
    • http://files.stlawrencevbs.com/uploads/1/3/1/3/131383386/vamoxugewo-zanosomarebamir-rarafagaf.pdf
    • http://files.gwdancecenter.com/uploads/1/3/2/6/132682585/6606e38e195e1.pdf
    • http://vupaxefed.legacyministries.info/uploads/1/3/1/4/131483245/7674.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9469/5324/files/python_email_parser.pdf
    • https://cdn.shopify.com/s/files/1/0430/0741/0329/files/bobatuzulupalitoju.pdf
    • https://cdn.shopify.com/s/files/1/0436/7430/4662/files/voferozigesinus.pdf
    • https://cdn.shopify.com/s/files/1/0434/3955/4727/files/46124463380.pdf
    • https://cdn.shopify.com/s/files/1/0432/5595/5613/files/applied_mathematics_3_gv_kumbhojkar.pdf
    • https://cdn.shopify.com/s/files/1/0435/1718/2104/files/44465041522.pdf
    • https://cdn.shopify.com/s/files/1/0450/8519/6453/files/bwssb_recruitment_2019_key_answer.pdf
    • https://cdn.shopify.com/s/files/1/0454/2539/3832/files/manual_citroen_c3_xtr_2009.pdf
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/35700503666.pdf
    • https://cdn.shopify.com/s/files/1/0432/1483/1780/files/85403953593.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007482.bin
63fb04e585469670c82ac11a64326b9b3d247753d38f3a19cf96de4566a0de1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7482 5340 bytes
font_01_sfnt_off0000869c.bin
666178ad36d1b10c9673a84273deb1e6561dc379009d52a8756fac1e1d792a24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x869C 10524 bytes
font_02_sfnt_off0000aad1.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAD1 16204 bytes

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