Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f3e74ea0269113…

MALICIOUS

PDF

42.8 KB Created: 2020-08-16 17:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1abd5b8535553462ee7d80a232e2efac SHA-1: df049bf9aeb6b07431175d7a9eccceb0c3a1ef69 SHA-256: b1f3e74ea02691133485abf4ca7ca0fba32d616617ccbaa3d1e712698ac4401b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to a known malicious domain (ttraff.cc). This indicates a phishing or scam attempt, likely to drive traffic to malicious sites. The ML classifier strongly supports the malicious verdict. No scripts were extracted, limiting the analysis of specific execution behaviors.

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=android+one+miui+10
    • http://defiko.suppressivefire.net/uploads/1/3/0/7/130738801/2304754.pdf
    • http://kapikelox.splaxcustoms.com/uploads/1/3/1/4/131453329/5501635.pdf
    • http://bozevi.alternaterealityphoto.com/uploads/1/3/0/8/130814681/8453387.pdf
    • http://files.employeetimeclocks.net/uploads/1/3/2/6/132681066/belogisob-xekod-nodepife.pdf
    • http://dolemo.tunedincoach.com/uploads/1/3/1/4/131482822/ad8e31c659cc5f.pdf
    • https://cdn.shopify.com/s/files/1/0437/4495/2471/files/yugioh_nightmare_troubadore.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/vijozigavolaluv.pdf
    • https://cdn.shopify.com/s/files/1/0430/4103/0293/files/23579285784.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/50257937104.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gekubamunanapomokavonata.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/different_types_of_hand_embroidery_stitches.pdf
    • https://cdn.shopify.com/s/files/1/0431/7223/3380/files/xuronafewawig.pdf
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/libro_acls_2020_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4902/files/zavutunegedaro.pdf
    • https://cdn.shopify.com/s/files/1/0447/5705/7685/files/fowles_and_cassiday_analytical_mechanics_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/puwisipuwum.pdf
    • https://cdn.shopify.com/s/files/1/0440/8279/0552/files/ford_labor_time_guide.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_off00006a47.bin
ddb403bc9e05ecd1c153f6a46a62e91941ea6ca77a84ebdc27f38dbf04482525		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A47 4732 bytes
font_01_sfnt_off00007a45.bin
e797ce9e82863079bb20568931806aaff9585864e607e4cfc809e1ca5213ae27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A45 10576 bytes

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