Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c0780a6726eec1…

MALICIOUS

PDF

47.8 KB Created: 2020-10-28 12:39:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 144516c258d9479d62af15c63f55b05c SHA-1: dfe7f2c598ec1286d6e2b7223b0224e02d85e5fc SHA-256: e1c0780a6726eec194459648d811acc0b2186c29a80fe588a16f0fcc08b4fcea
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, the PDF is flagged as a link farm, suggesting it's designed to distribute traffic to numerous external sites. The ML classifier also strongly indicates maliciousness. While no scripts were extracted, the embedded URL and the nature of the heuristics point towards a phishing or malware distribution attempt.

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/123?keyword=fe+electrical+and+computer+review+manual+by+michael+r.+lindeburg In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5f9354829aaa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379960/normal_5f95ecbadc8f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5f8733a9ccaca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378165/normal_5f94bd2191828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383302/normal_5f8d13a9e3131.pdfIn 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://uploads.strikinglycdn.com/files/dcc4f8b4-2aa1-4acb-823a-1869ea98ab29/45154966099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fc88e74-0f37-4e42-96ca-e4aa7588e03f/fobefudadefudabibuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9477/7757/files/rizunojuwin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6daf604a-1562-4801-a546-1f73c100e87b/verbe_aimer_en_latin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43558889-fd1d-4784-8c6f-3c300b388baf/munegaditadivegifewemivum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4429af9e-f8d5-46c0-800f-a89609e49d89/bidiradawovamisewami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94ba0b72-deb6-48f2-884f-0207a5136e32/13665211979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3036/2304/files/63970041310.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/24599704651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9324/4069/files/58245573185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d817e23b-e2c9-4f6a-8640-364052a1bd1e/ziretolamigajegademodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34862d9f-c35c-432b-90ae-70afaca9e4a4/vazin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6775/2100/files/75726999554.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/2996011627.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91560cd2-d044-4815-9d9e-05e56ce7d3b4/93469809546.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/makomenugejugimozivepil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5586678-97a9-44fc-9fc6-3749668535f2/gym_training_programme_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6773/6225/files/91509165793.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/mutasojixivubuvobojam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6096df79-c266-45df-952d-64a4a52cca72/17_inch_hubcaps_walmart.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_off00006a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A66 5572 bytes
SHA-256: 15e5ad3565190a36e76c14cc7f043bd255df8c2cc7d1053136b323f2daa90b70
font_01_sfnt_off00007d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D38 10920 bytes
SHA-256: daea347b1a16b1176d2d66e49381f30387d073b3b9d7ead2601a5bc50dca345e
font_02_sfnt_off0000a268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA268 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176