Malicious PDF — malware analysis report

Static analysis result for SHA-256 6efabff6dbc18e00…

MALICIOUS

PDF

42.9 KB Created: 2020-08-28 06:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aca0ca5a024a7df3893dfb48259b655a SHA-1: 6c0a5800eae69d2adc2c8ad655408b08d9a6950a SHA-256: 6efabff6dbc18e001a24330e6176d75c3d716092a02e8713f2e31b513032b31a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that is also present in the list of embedded URLs. This suggests the document is designed to lead users to malicious sites, likely for phishing or malware distribution.

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=craftsman+8.+5+hp+chipper+shredder
    • http://files.vmplf.com/uploads/1/3/1/6/131606818/aef02d7.pdf
    • http://files.lisawarns.com/uploads/1/3/0/7/130738984/zamen-teguruxepo-mosejibabogosew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0447/2933/5962/files/libejemugezuvu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8588/files/gilorivadoturajoxomud.pdf
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/12397047700.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/70296047881.pdf
    • https://cdn.shopify.com/s/files/1/0451/0665/9493/files/ball_bearing_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/1344/5544/files/rukanunabopowoguvuwupevi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2391/files/80376683887.pdf
    • https://cdn.shopify.com/s/files/1/0433/9885/6867/files/bawivunobajanagamu.pdf
    • https://cdn.shopify.com/s/files/1/0436/3816/1561/files/ahmedabad_city_map_hd.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4742/files/assassin_s_creed_identity_free_mob._org.pdf
    • https://cdn.shopify.com/s/files/1/0469/5031/8241/files/furaberexepa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/jugarefi.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_off000068fc.bin
e9996c13a7b543030a019d726835bade1fcc6e26fcd35cb1234d6230f8812c8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x68FC 5616 bytes
font_01_sfnt_off00007be3.bin
9c32bc7060adafafac9da85e5a2497503b97aa87b50ec1174aef2f7b0f371ad9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE3 10032 bytes