Malicious PDF — malware analysis report

Static analysis result for SHA-256 72beae172356ae8c…

MALICIOUS

PDF

51.2 KB Created: 2020-08-31 06:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8a574df3e93cd22371109199bd8e097 SHA-1: 3387570926ea8f49bf242f42a06bac7fabb69033 SHA-256: 72beae172356ae8cc65d4b9d1277420cf1013bf547c7861e24746497a125de14
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a link farm designed to manipulate search engine rankings. One prominent link directs to a known malicious redirector, suggesting an attempt to lead users to malicious content. The document body, though heavily obfuscated, contains text related to a service manual and the malicious URL, reinforcing the lure.

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/wix?keyword=hp+designjet+t790+eprinter+series+service+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/36f25b_cb6f94f43db64f5fa0b6ea0caf67809d.pdf
    • https://static.usrfiles.com/ugd/eda9ba_5f557f57c6684f7285f0c044cda009d8.pdf
    • https://static.usrfiles.com/ugd/fac845_62309c25bd494af4b9a8e6cbccc62510.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5acf02223be4a95828d47b5ada9c786.pdf
    • https://static.usrfiles.com/ugd/fbccce_a052c48ba9394b3da8b3e2edbb4b198c.pdf
    • https://static.usrfiles.com/ugd/76b6de_d56cf193eaab499bb1ca42abe8aeca7b.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/poxoputevovoxikobifoni.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0810/files/comptia_network_study_guide_fourth_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/5398/1594/files/84902618963.pdf
    • https://cdn.shopify.com/s/files/1/0430/7710/7865/files/cost_and_management_accounting_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/5240/0789/files/dugojadojigupakum.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/97106525479.pdf
    • https://cdn.shopify.com/s/files/1/0438/4112/6565/files/datupurukezevufagaxu.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_off00007dfb.bin
ecd26c33926ee7c77567eac320b533575fe1ff59617c915f04e726bbad1f411a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFB 5868 bytes
font_01_sfnt_off000091ea.bin
0fb6b40c41a56e8ff1bd9e5905c82f2b03687650e9d4f2bdd7fc07218db6c6c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x91EA 14924 bytes