Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc185f001102f46…

MALICIOUS

PDF

42.5 KB Created: 2020-11-03 07:54:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1330783b4ba06cf826bc082ff03a645f SHA-1: 1cf80d1b0b46ef29ab22047ee9afa206573a0e53 SHA-256: 0fc185f001102f468e943f862a782710ae0577d747ead4c6397f93e94ababd01
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for SEO-related content, likely to disguise the malicious intent. The presence of many external PDF links suggests a link farm or SEO poisoning 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://ggtraff.ru/aws?keyword=define+long+term+orientation+culture In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0478/9754/2822/files/spring_mass_system_frequency.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1884/5860/files/64033568284.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9620/2652/files/game_rodeo_stampede_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9691/5616/files/pathfinder_player_companion_alchemy_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3868/6407/files/sous_vide_egg_bites_costco_cooking_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/85784718475.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3412/3157/files/cid_watch_online_apne_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/water_pollution_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/gorobatogimovawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3966/0954/files/transfer_imprint_command_ark.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a347e1e-1963-4ae1-aeab-c49521860746/canon_t31_bundles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5289/1298/files/xufuga.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE2 4904 bytes
SHA-256: d1eaca24e487f6859d9f36ce55b44c992e83805bc35328d993a2ab92a6f2fc1a
font_01_sfnt_off00006c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7D 10144 bytes
SHA-256: 1a9d4ae8a8b254fb544151c6d35dd0887c0100e5dc84915dd4db72861a59f03b
font_02_sfnt_off00008efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFC 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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