Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd82ad46789eec0…

MALICIOUS

PDF

44.7 KB Created: 2020-09-04 08:36:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ceeb16dbcb259e0865b5e41641bb256f SHA-1: 0bb3e0da2db2290d1f6aa992c0c946d670812bf6 SHA-256: 9fd82ad46789eec059d7e8a700a4f0b32b8baa3b0cc4ca9e6882137f3d1404d5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a search result for 'hlookup google sheets example'. This link, 'https://ttraff.me/wix?keyword=hlookup+google+sheets+example', is designed to lead users to further malicious content. The document also hosts a large number of other PDF links, many on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic to increase visibility.

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=hlookup+google+sheets+example
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/zuraxeporujaxubojemetom.pdf
    • https://cdn.shopify.com/s/files/1/0432/4858/2820/files/my_jio_calling_app.pdf
    • https://cdn.shopify.com/s/files/1/0437/6612/0609/files/math_worksheets_4th_grade_printable.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/pivafalopasegerefak.pdf
    • https://cdn.shopify.com/s/files/1/0434/3663/8369/files/70322898008.pdf
    • https://static.usrfiles.com/ugd/35e1ce_ae4ca8d5a64244029bf698500eb7b5a0.pdf
    • https://cdn.shopify.com/s/files/1/0432/6565/4939/files/vojidoramitirisuxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6200/files/tidudosifisitudaloxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3349/files/4870078596.pdf
    • https://cdn.shopify.com/s/files/1/0459/7127/5943/files/45434096745.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9606/files/78818256696.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1931/files/24668357623.pdf
    • https://cdn.shopify.com/s/files/1/0433/3194/4602/files/negevojijebaduforewimivu.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_off00007153.bin
99ce178dbf35acff1cb21061c7d37ef4770f3606e0ba19bcd5809b1c224ef71c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7153 5228 bytes
font_01_sfnt_off00008305.bin
f9c1d7f53eb051291dba005824d16878fccfdedd946e287137e2219fe31c4733
pdf-font-stream PDF embedded font (sfnt) at offset 0x8305 10252 bytes