Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f3741ab2df4c147…

MALICIOUS

PDF

48.7 KB Created: 2020-08-22 07:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c63b433dca3daa4be083006feca6e30 SHA-1: c22d6244194335fc6c9b1be3dac66b2b765e3fac SHA-256: 5f3741ab2df4c14705bca600eefd80c72b19e963c528b870c005f326d33115ca
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to what appears to be a link farm designed to mimic academic papers. One prominent URL, https://ttraff.cc/pify?keyword=ieee+papers+on+artificial+intelligence+2018+pdf, is identified as a malicious redirector. The document's structure and content suggest an attempt to trick users into visiting 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=ieee+papers+on+artificial+intelligence+2018+pdf
    • http://fuxawisu.robbygilbert.net/uploads/1/3/0/8/130874359/348442.pdf
    • http://files.beanoartshop.com/uploads/1/3/2/6/132696018/6270f908330888.pdf
    • http://paxavi.reasonandjustice.com/uploads/1/3/1/4/131437425/14abc4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0323/1908/files/commercial_roofing_proposal_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/7742/7609/files/77693351741.pdf
    • https://cdn.shopify.com/s/files/1/0432/7650/1147/files/98684522583.pdf
    • https://cdn.shopify.com/s/files/1/0438/1966/3517/files/60897974415.pdf
    • https://cdn.shopify.com/s/files/1/0428/3426/4231/files/11354908166.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2056/files/57977923318.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/foledux.pdf
    • https://cdn.shopify.com/s/files/1/0460/1482/4607/files/26777351772.pdf
    • https://cdn.shopify.com/s/files/1/0430/9843/9837/files/kogorafajonedogerudat.pdf
    • https://cdn.shopify.com/s/files/1/0431/6571/2535/files/igt_game_king_slot_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/office_attendance_format_in_excel.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_off00007bdf.bin
79c2563daef8222a4d4f988d3f2d272d3304ca8ca80ca1a38f8d5334e62f8920
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDF 5780 bytes
font_01_sfnt_off00008f98.bin
48aea1699fc36efbfa81a836ecbc49f67c48d5fc294cd224294a8a18f16f603e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F98 11196 bytes