Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cac70416683d86b…

MALICIOUS

PDF

47.1 KB Created: 2020-08-19 13:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f48a25a9c7009a67a7d17fe60872ecfe SHA-1: 2336227b0c83352de73886a53a6d11e2e8c966a6 SHA-256: 1cac70416683d86be940273123c97d270505b64c5c5cae4bf1999c6ec27108ad
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is also present in the document body. This suggests the primary goal is to redirect users to malicious infrastructure. No scripts were extracted, limiting the analysis of further stages.

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=diazomethane+carbene+formation
    • http://tufoz.m.teakslockservice.com/uploads/1/3/2/6/132682663/bubunibusam.pdf
    • http://files.rocksolidcorporateevents.com/uploads/1/3/1/6/131637038/4493473.pdf
    • http://files.pnagkc.org/uploads/1/3/1/4/131438891/juvoxasomas.pdf
    • http://files.dehoniansocialjustice.org/uploads/1/3/1/1/131164020/tejaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6341/0845/files/jedolujamoli.pdf
    • https://cdn.shopify.com/s/files/1/0431/1583/9645/files/26658278036.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/possessive_nouns_worksheets_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0437/8699/3816/files/44058936227.pdf
    • https://cdn.shopify.com/s/files/1/0431/8402/9854/files/61992729651.pdf
    • https://cdn.shopify.com/s/files/1/0441/0369/6536/files/tacoma_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/1400/3610/files/33192321175.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6933/files/kayla_itsines_workout_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8511/files/practical_kabbalah_part_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/6095/2229/files/31744643283.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/dovinagusuzebiw.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/gonoponinas.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/
    • https://cdn.shopify.com/s/files/1/04

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078de.bin
263625ca254c37969cd5675edb7bd06c086a145796a89cf4854d78267da3db41
pdf-font-stream PDF embedded font (sfnt) at offset 0x78DE 5100 bytes
font_01_sfnt_off00008a24.bin
8f5fa4d5679f2366e48df956368c954bec0611d8f445efc076103f29639b772a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A24 10900 bytes