Malicious PDF — malware analysis report

Static analysis result for SHA-256 070f570b73964256…

MALICIOUS

PDF

48.7 KB Created: 2020-08-29 07:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25f98cf46b096baca21918bdce3c5580 SHA-1: 2213586afc5e256270686b1a1f31c2152a584da7 SHA-256: 070f570b739642563b0e5fca31698e7121b022d62c711d9a49cdc4b6a360651f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though partially corrupted, contains the malicious URL, suggesting a lure to external content. The presence of multiple Shopify links suggests a link farm used to obscure the true malicious destination.

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/wix?keyword=m%25C3%25A9moire+compl%25C3%25A9mentaire+tribunal+admi
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/laderasu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1673/2315/files/arm_assembler_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/9526/8264/files/magus_pathfinder_guide_kensai.pdf
    • https://cdn.shopify.com/s/files/1/0431/5093/4173/files/7195207302.pdf
    • https://cdn.shopify.com/s/files/1/0441/2915/7272/files/vafasokaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/5970/7037/files/82647065000.pdf
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/retirement_planning_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0432/3354/2303/files/waluxogun.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf6424b2a5d14e59af56f43835f6b197.pdf
    • https://static.usrfiles.com/ugd/b8c837_f955ff3a70fb4d828141dce74cdfb3be.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0c2275576d54cdbb059520f99d8ca0a.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_off00007daf.bin
e6e403eb4523ca66a4baa460123dd5787031c1a139d28172631464454edee785
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAF 5328 bytes
font_01_sfnt_off00008f62.bin
d83fea4e818ff5b4a5d0c7992cbb7fb891ba26d74e44fdd89c14ce71ec839888
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F62 11360 bytes