Malicious PDF — malware analysis report

Static analysis result for SHA-256 a68227f4b73034ce…

MALICIOUS

PDF

43.6 KB Created: 2020-09-08 23:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de6d16df186a93f0909c5fffe77d9db7 SHA-1: 4acd2d0102c5a2b4726160d1a529db1e25b884ab SHA-256: a68227f4b73034ce0a0eb865dd58fb88949446aaa9262e61fa156cac9c7c7154
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain. The document body text and embedded links suggest a lure for users to download a file, likely leading to further malicious activity. The ML classifier strongly indicated maliciousness.

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.club/pify?keyword=australian+flag+printable+template
    • https://cdn.shopify.com/s/files/1/0432/6880/0676/files/jquery_1._9_1_min_js.pdf
    • https://cdn.shopify.com/s/files/1/0430/5561/2058/files/oxford_bookworms_library_stage_1_titanic.pdf
    • https://cdn.shopify.com/s/files/1/0432/7158/5952/files/effective_communication_skills_file.pdf
    • https://cdn.shopify.com/s/files/1/0432/2128/7067/files/cardiotonicos_farmacologia.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/21725708016.pdf
    • https://cdn.shopify.com/s/files/1/0433/3617/1679/files/basic_guitar_chords_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/3319/0823/files/raxajetiganu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/genetically_modified_organisms_social_and_ethical_issues.pdf
    • https://cdn.shopify.com/s/files/1/0438/6455/5680/files/comparative_superlative_rules.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2695/files/purikizezitonusuz.pdf
    • https://cdn.shopify.com/s/files/1/0427/3173/3159/files/baforulub.pdf
    • https://cdn.shopify.com/s/files/1/0440/6899/5237/files/pelajoweterevepunur.pdf
    • https://cdn.shopify.com/s/files/1/0435/7314/9859/files/4987442507.pdf
    • https://cdn.shopify.com/s/files/1/0431/4402/0125/files/gusew.pdf
    • https://cdn.shopify.com/s/files/1/0428/7922/1927/files/gofuxujuromexinis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ef4.bin
8cf9e6a8fe25901dba518b5bcb8406e292ecddcc050249f78d3097a725bbfd0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF4 5120 bytes
font_01_sfnt_off0000703e.bin
8d89405aaa808faf324e5bc75fdc0adaaf72f52118ed9ce6c764a0c8bba8e5d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x703E 10172 bytes
font_02_sfnt_off00009310.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9310 4324 bytes