Malicious PDF — malware analysis report

Static analysis result for SHA-256 4303fccf5232cab1…

MALICIOUS

PDF

33.6 KB Created: 2020-08-18 13:39:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0baa8af7323d8d1dac69f7b5b6d06d15 SHA-1: eae1d9dea0f0fadc9513064c5f0c1bcde54628f7 SHA-256: 4303fccf5232cab13879aee0cf566c1699f355df20bb5c71f9f50e4b295f057c
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. Additionally, it contains a mass external PDF link farm, with many links hosted on 'cdn.shopify.com' and other domains, suggesting a coordinated effort to distribute malicious content or redirect users. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the extensive use of redirector links points to a likely phishing or scam campaign.

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=lagu+bungong+jeumpa+4+menit
    • http://files.childrenareourspecialty.com/uploads/1/3/1/4/131409055/74836.pdf
    • http://files.pinnacleflycutter.com/uploads/1/3/1/6/131606165/nasujezutuzivazodili.pdf
    • http://files.londonhalleditions.com/uploads/1/3/1/1/131163872/nalod.pdf
    • http://zeduwa.sanderlingproductions.net/uploads/1/3/1/3/131383629/gugowadunimuzo.pdf
    • http://pavufeto.donnaholdsworthart.com/uploads/1/3/1/6/131637419/0cba34b4d67671.pdf
    • https://cdn.shopify.com/s/files/1/0437/2611/0885/files/99211662306.pdf
    • https://cdn.shopify.com/s/files/1/0428/4658/4999/files/vivazepilaleziposexonimed.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/wixajawoti.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67264452348.pdf
    • https://cdn.shopify.com/s/files/1/0441/0087/8488/files/29198448125.pdf
    • https://cdn.shopify.com/s/files/1/0438/4784/4000/files/a_short_history_of_thailand.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/59620309296.pdf
    • https://cdn.shopify.com/s/files/1/0429/9839/9139/files/85532195127.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/51831561008.pdf
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/but_because_so_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1044/files/31376535404.pdf
    • https://cdn.shopify.com/s/files/1/0429/2512/9894/files/dikevogavudobolimomofeve.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/earth_work_calculation_in_excel.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_off00004696.bin
ff3f6f2963497d3339ee39e776f68d3c2c804e4f14cca786cee7ed49590b5ea6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4696 5076 bytes
font_01_sfnt_off000057df.bin
42bec6da2fb7201a5bc2482c95f489786777db047d9d5f5946675a5f7c526587		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57DF 9396 bytes

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