Malicious PDF — malware analysis report

Static analysis result for SHA-256 1514afcb6249109f…

MALICIOUS

PDF

66.3 KB Created: 2020-08-19 12:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebc65721df04156e60efa15dc7368e69 SHA-1: b7dbf0dc44fd5ad68019735af20758a21785af17 SHA-256: 1514afcb6249109f767e03f500cc58b55c9e18a7bc7f8b9c7255447fdbcba4fd
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a 'psychological assessment report sample PDF', likely a lure. The presence of many external PDF links, some pointing to benign Shopify domains and others to unknown domains, indicates a link farm or SEO poisoning attempt to distribute malicious content.

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=psychological+assessment+report+sample+pdf
    • http://files.fishyjewelry.com/uploads/1/3/0/8/130874647/dunuzipuzudet_dotosetik_jebebugoluguz_lidesij.pdf
    • http://bitiv.houseofskinmelbourne.com/uploads/1/3/0/7/130776054/wufizase-depatobuvubot.pdf
    • http://files.mllecameron.com/uploads/1/3/0/7/130739063/fubisavizebifud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7141/4173/files/angularjs_multiple_controllers.pdf
    • https://cdn.shopify.com/s/files/1/0432/6565/4946/files/51288814427.pdf
    • https://cdn.shopify.com/s/files/1/0434/9237/6741/files/57731967522.pdf
    • https://cdn.shopify.com/s/files/1/0440/2266/1278/files/whirlpool_cabrio_dryer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0452/4684/0994/files/conditions_of_admission_form_hospital.pdf
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/25119272419.pdf
    • https://cdn.shopify.com/s/files/1/0437/7578/7169/files/attu_movie_songs_hd_1080p.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/alkenes_questions.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/bupele.pdf
    • https://cdn.shopify.com/s/files/1/0428/9147/7159/files/62399905169.pdf
    • https://cdn.shopify.com/s/files/1/0433/9076/3175/files/area_of_a_triangle_coordinate_geometry_worksheet.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_off0000c545.bin
4a382498d82c500bddcf0d706d4e245674c103a9828b6953e2d0d56313a8c4b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xC545 5672 bytes
font_01_sfnt_off0000d869.bin
7e46c4fbef90b6e6d2e0c95aef40ffe71d43996dfc96a69df0d61ed839ef4921
pdf-font-stream PDF embedded font (sfnt) at offset 0xD869 10500 bytes