Malicious PDF — malware analysis report

Static analysis result for SHA-256 068f043bd97cf635…

MALICIOUS

PDF

49.4 KB Created: 2020-08-24 17:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e88da0f9a4d8b9317e69ec0f1ac19d2 SHA-1: c8ce1e3aa9740c2a88b5b08b48f662629826d730 SHA-256: 068f043bd97cf6354df490a400969c0bdc97a443f371fd738d6cd62593e4405c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, masquerading as a "Directv program guide title not available" search result, which redirects to a malicious URL. The ML classifier strongly indicates maliciousness, and the presence of numerous links suggests a link farm or phishing attempt. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/pify?keyword=directv+program+guide+title+not+available
    • http://robudowoj.bhelandscaping.com/uploads/1/3/0/7/130776644/3795306.pdf
    • http://files.philippecorriveau.com/uploads/1/3/0/7/130739871/e10e893d8.pdf
    • http://gazidi.getbeand.com/uploads/1/3/2/6/132682076/6b45201a94d54c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/0250/2054/files/pearson_mastering_physics_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/8379/0491/files/94_buick_century.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3556/files/ginejofunaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/5680/8607/files/82030728994.pdf
    • https://cdn.shopify.com/s/files/1/0432/1722/3847/files/41865363118.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/6262989797.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/doninn_audio_editor_apk_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/7121/7565/files/driver_handbook_haitian_creole.pdf
    • https://cdn.shopify.com/s/files/1/0431/4680/5404/files/kawaju.pdf
    • https://cdn.shopify.com/s/files/1/0429/2126/3271/files/62319756532.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3126/files/zuwiwaxolazabakowas.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_off00007406.bin
b35a5ad4dc9a91f64ccdba6bbe9edd0e0b327bbacad415df0b4966f8b03b3184		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7406 5296 bytes
font_01_sfnt_off000085ef.bin
612fba3f99814dc1676095e70e8c89e9ba377a3f65e2bdb27c4ec80a78ea3e2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85EF 10536 bytes
font_02_sfnt_off0000a9f1.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9F1 4324 bytes

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