Malicious PDF — malware analysis report

Static analysis result for SHA-256 02c80cdf17552f17…

MALICIOUS

PDF

43.4 KB Created: 2020-09-07 08:24:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47115db5e8597fb4a0731d03aae7edf1 SHA-1: 25a5e53547d2545c37090bb78c648ebd13d70d0f SHA-256: 02c80cdf17552f172f75f865d2d20cf9448e0e42e96de83db8bb12c6d179863d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. It also features a large number of external PDF links, many of which point to benign Shopify URLs, suggesting a possible SEO poisoning or link farm tactic to mask the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

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/wix?keyword=fullmetal+alchemist+game+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2314/6906/files/shear_force_and_bending_moment_chapter.pdf
    • https://cdn.shopify.com/s/files/1/0434/6730/9206/files/91091638880.pdf
    • https://cdn.shopify.com/s/files/1/0432/9226/2560/files/lagu_rewrite_the_stars_cover_rezlynx.pdf
    • https://cdn.shopify.com/s/files/1/0436/1751/7725/files/logical_reasoning_sample_questions.pdf
    • https://cdn.shopify.com/s/files/1/0466/7952/3493/files/netgear_extender_ex7300_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/6470371762.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4340/files/electrochemical_cells_lab_answers_experiment_21.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/44084504896.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6124/files/51953066303.pdf
    • https://static.usrfiles.com/ugd/e6092c_f89b67ff5cf04fbca12a39682329121e.pdf
    • https://static.usrfiles.com/ugd/735189_52a03128a9014afa87b697e5ee3871e9.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_off00005c70.bin
45064687ee63c00ba358d3d2f8463b6c9612afe19215c7ebb73306083552ef45
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C70 4588 bytes
font_01_sfnt_off00006c40.bin
ad2e2c4212a904e07d63973dd30cf0eaab71f2ccbd7ee9e8f1f68651b2eb26b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C40 5308 bytes
font_02_sfnt_off00007e1a.bin
9daab1d0bfec60fc9eb05e8164fdd3cf3779112dc9f7b4d2bf43dfcf0cc44c38
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1A 10104 bytes