Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1494b10188b15a0…

MALICIOUS

PDF

56.1 KB Created: 2020-10-31 08:04:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a9cdc24a22c76e466f77517e247145fa SHA-1: cfaa66f2774fadc4c644fe0d740e619f96cd1832 SHA-256: e1494b10188b15a069b718ab0c6e9d48eedde8e3a40583589a6a7cceafd0f3c4
154 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to known malicious redirector infrastructure. The ML classifier strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, 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.me/123?keyword=honda+trail+90+parts+list In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f98cccbf2ef5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428331/normal_5f9988404a6ef.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/ebf3930f-5d20-429e-8223-09d3d2f038fb/kugiketekebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2265c192-49b0-4f25-8624-84aeab0a406d/95721007050.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/august_2019_current_affairs_in_gujarati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd4e32f-5766-4610-b61f-cd4fae468007/fajamodiwoke.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/guarana_dosagem_usual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9537/9105/files/the_law_of_reflection_says_that.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/kabovosuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8783/2256/files/suwisejuzosaxonesupu.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/brindisi_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae27203a-e89b-4748-ae99-d195eb5e2042/spyderco_slysz_bowie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6610/4226/files/xawagekiwasuropetaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6764/5852/files/2903275274.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_off00008cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB9 4880 bytes
SHA-256: 18d02b0e581d38179f07a16302523026694bdf7d26582430199cb35130453816
font_01_sfnt_off00009d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D42 11812 bytes
SHA-256: 271fed05a40dae0fca621c46998122bd89c318fe6839857dfcb219afa2c76f37
font_02_sfnt_off0000c510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC510 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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