Malicious PDF — malware analysis report

Static analysis result for SHA-256 86694977ca52253a…

MALICIOUS

PDF

47.0 KB Created: 2020-08-28 03:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d01f510c58c03ca914931f34dde701c1 SHA-1: d067b93a5d97c03a03f17675f42b111d608d485f SHA-256: 86694977ca52253a643130295db95d560fa2a8b3c3346d66036c04b4c9793530
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially obfuscated, includes the target URL and appears to be a lure for a PDF classification resource. The presence of a link farm and a malicious redirector strongly suggests a phishing or scam attempt, likely delivered as a spearphishing attachment.

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=clasificacion+de+los+huesos+pdf
    • http://roruvetev.familiesfightingaddiction.org/uploads/1/3/0/7/130740522/150085.pdf
    • http://ravikiri.evelynwalters.com/uploads/1/3/0/8/130874493/gesolapunedi.pdf
    • http://files.fromeselwoodbowlsclub.org/uploads/1/3/0/9/130969960/serezoxegozibaf_dasowumilugaf_netolavifu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/8814/2743/files/2444760337.pdf
    • https://cdn.shopify.com/s/files/1/0434/0056/0803/files/45885428105.pdf
    • https://cdn.shopify.com/s/files/1/0435/5073/6533/files/obi_wan_midichlorian_count.pdf
    • https://cdn.shopify.com/s/files/1/0451/1848/8741/files/a_smartwatch_to_read.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9158/files/gabekokonafagixemox.pdf
    • https://cdn.shopify.com/s/files/1/0434/5085/9670/files/bengali_to_english_dictionary_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/3698/0886/files/39937970997.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/selaromikox.pdf
    • https://cdn.shopify.com/s/files/1/0427/9386/1279/files/gitiwum.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7473/files/urbanismo_inca.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_off00006451.bin
57134bf7e3d35b3425c41465cdb6e2edf0f894b1ea6ecd96b13bc7a1d2335541		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6451 4972 bytes
font_01_sfnt_off00007524.bin
bd8601c57021526b04597ef4c63724bfa8172f56fc927c29d690d6ae869cdecf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7524 13760 bytes
font_02_sfnt_off00009f66.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F66 4324 bytes

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