Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c646841c6e78a3…

MALICIOUS

PDF

68.2 KB Created: 2020-08-11 08:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2591e1ab3bd1407965c1f1dab51cf825 SHA-1: 11b3025dd8823eac6ad65c8656a28a1192ad9942 SHA-256: 06c646841c6e78a31613fa137b28d0a71237cb4b25f130124f3c41bb16c1b229
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is ttraff.ru, which is known to host malicious content. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to disguise its true purpose. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=barium+electron+configuration+spdf
    • http://dagapo.desertdew.net/uploads/1/3/1/6/131606027/ad18f6dde39.pdf
    • http://files.hunyuansingapore.com/uploads/1/3/1/3/131383777/2132629.pdf
    • http://raxolaxom.prudencemaltby.com/uploads/1/3/0/8/130813420/54eb27.pdf
    • http://files.yvonnesthemeparties.com/uploads/1/3/2/6/132696044/c4c414.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/1251/4201/files/vagiloxolewepo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gizuvesadumewagetikuxumut.pdf
    • https://cdn.shopify.com/s/files/1/0432/5300/6494/files/nuzid.pdf
    • https://cdn.shopify.com/s/files/1/0440/7079/7462/files/breath_control_exercises_for_singers.pdf
    • https://cdn.shopify.com/s/files/1/0430/6917/8017/files/silmarillion_ainulindale.pdf
    • https://cdn.shopify.com/s/files/1/0428/2544/9628/files/dudisozonubufe.pdf
    • https://cdn.shopify.com/s/files/1/0435/3271/4139/files/cantico_delle_creature_spartito.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/bis_feral_druid.pdf
    • https://cdn.shopify.com/s/files/1/0427/4490/5884/files/dupos.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3277/files/new_english_file_beginner_3rd_edition_teacher_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/pokemon_go_can_t_authenticate.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_off0000b4e7.bin
9c5e3f158a2e0d342069d7d7ca431e2ad6f4d9d24818912c97564861850b1963		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E7 5404 bytes
font_01_sfnt_off0000c72e.bin
beda5cca5cbd2649d8c44da4ef7d1f32cfc79cf3ed0d5618a57bacb26dd6fd87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC72E 14764 bytes
font_02_sfnt_off0000f530.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF530 4324 bytes

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