Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef470b54e3dc8889…

MALICIOUS

PDF

34.4 KB Created: 2020-08-11 18:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e884d4540e781e60f883955bbd7c24f3 SHA-1: 53fcfd418536d7a664793adb37a4b5e9ae7781a0 SHA-256: ef470b54e3dc8889676cb5829e3f97e4852dd67bd758b165816af65df8d297d5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically pointing to a redirector URL (https://ttraff.cc/pify?keyword=figure+drawing+for+fashion+design+pdf+download) that likely leads to malicious content. The document body, though heavily obfuscated, contains text related to 'figure drawing for fashion design pdf download', suggesting a lure to trick users into downloading further malicious files. The presence of a link farm further supports the malicious intent.

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=figure+drawing+for+fashion+design+pdf+download
    • http://files.hop2osoda.com/uploads/1/3/0/9/130969305/tizarilag_gunufutukef_takesedoxukujin_jegeji.pdf
    • http://files.andrewmscott.com/uploads/1/3/0/7/130739112/wumetan.pdf
    • http://files.mayaolsonphotography.com/uploads/1/3/0/9/130969761/pawerajiligafe_rejefimazufore.pdf
    • https://cdn.shopify.com/s/files/1/0434/9558/8005/files/91977649182.pdf
    • https://cdn.shopify.com/s/files/1/0436/1833/6925/files/lean_bodybuilding_diet_plan.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/guriworug.pdf
    • https://cdn.shopify.com/s/files/1/0430/7274/9721/files/45874455045.pdf
    • https://cdn.shopify.com/s/files/1/0435/0305/9110/files/tolumozenejezetisox.pdf
    • https://cdn.shopify.com/s/files/1/0433/7287/1832/files/27225863358.pdf
    • https://cdn.shopify.com/s/files/1/0434/4909/0200/files/tmux_vertical_split.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/88384496389.pdf
    • https://cdn.shopify.com/s/files/1/0428/2921/7958/files/44759684619.pdf
    • https://cdn.shopify.com/s/files/1/0450/7402/2550/files/egzamin_certyfikacyjny_b2_angielski.pdf
    • https://cdn.shopify.com/s/files/1/0439/4595/1400/files/blackroots_science_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/kavojunokuk.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000492d.bin
a6803dcd6f7390db02c58426b16c3a1b7a34f148e78cc59beec2e40a0c7a5281
pdf-font-stream PDF embedded font (sfnt) at offset 0x492D 5352 bytes
font_01_sfnt_off00005b75.bin
6c54b0899c462c2837f226203d756e170fe0786916999caf11579f198f53c776
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B75 9700 bytes