Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b36b4d038b6e3e6…

MALICIOUS

PDF

43.1 KB Created: 2020-08-19 00:39:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d267ba0495ea496b20df3c1bef8f8205 SHA-1: caf9e3b7685e88177c8b0907d046f901fad1f28a SHA-256: 7b36b4d038b6e3e61807a697a8d5de0bf51938e9c74a6732ef1f970c705d6919
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is embedded within the document body, suggesting an attempt to direct the user to a malicious site under the guise of reporting counterfeit goods. The presence of a large number of external PDF links, many hosted on shopify.com, indicates a link farm strategy, likely to obscure the primary 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/pify?keyword=report+counterfeit+cigarettes+uk
    • http://files.relaxingcottages.com/uploads/1/3/1/3/131384407/lerasuzet_zuzalebuwi_narobelovadoge.pdf
    • https://cdn.shopify.com/s/files/1/0432/3809/7051/files/homeownership_advisor_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/4459/9958/files/bizilalawedi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3444/1890/files/dosoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/career_path_psychology.pdf
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/palgrave_study_skills_critical_thinking.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijev.pdf
    • https://cdn.shopify.com/s/files/1/0434/7795/8822/files/7473816244.pdf
    • https://cdn.shopify.com/s/files/1/0437/5651/9576/files/62815032150.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7669/files/17544371535.pdf
    • https://cdn.shopify.com/s/files/1/0434/0930/9848/files/bitatosekelajexutumo.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_off00005c35.bin
990367a9e76cc0dd835c1c2f777d21980b7d0c18318583d5e779a6b6b14858ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C35 5104 bytes
font_01_sfnt_off00006daf.bin
9196a306942375ca3d9f92c7740c8070545a39e573da6b04b4b4af26a9d3f42c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAF 10576 bytes
font_02_sfnt_off000091b4.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x91B4 4324 bytes