Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ebbc82877721388…

MALICIOUS

PDF

43.7 KB Created: 2020-08-02 20:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d09905e6dbc79f565e7d48ac60773989 SHA-1: e5102bff798e101d34fa6c066cf8687f58eb42f6 SHA-256: 9ebbc8287772138895e3a66e67a454ea144b450b6a5ba29fc9fbf01fa312c6f8
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=uninstall+xbox+game+bar+windows+10'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to distribute malicious content or engage in SEO poisoning. The ML classifier also strongly flagged this PDF as malicious.

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=uninstall+xbox+game+bar+windows+10
    • http://files.gregwhite76.com/uploads/1/3/1/4/131437276/mojakufak.pdf
    • http://files.drkimberlycharper.com/uploads/1/3/0/7/130775186/6da179c1732.pdf
    • http://files.mselias.com/uploads/1/3/1/0/131071312/bopajekedilabag-zameve.pdf
    • http://files.woutervanheesphotography.com/uploads/1/3/0/8/130813558/boxodejulog_jesap_xaxotoxalawin_vaziji.pdf
    • http://files.hustlera.co/uploads/1/3/1/4/131453267/1896899.pdf
    • https://cdn.shopify.com/s/files/1/0436/0758/9027/files/8917287323.pdf
    • https://cdn.shopify.com/s/files/1/0435/0482/8580/files/fufodome.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/12678479800.pdf
    • https://cdn.shopify.com/s/files/1/0433/9892/2403/files/wevafasejinudisapo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6086/2874/files/razunujawozukapekoki.pdf
    • https://cdn.shopify.com/s/files/1/0435/4991/7347/files/pacman_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lasuzopaxikabade.pdf
    • https://cdn.shopify.com/s/files/1/0429/9220/5978/files/sovexox.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4754/files/nitibumonexalado.pdf
    • https://cdn.shopify.com/s/files/1/0428/7257/0012/files/svg_to_png.pdf
    • https://cdn.shopify.com/s/files/1/0437/6369/5770/files/72044436943.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4252/files/45700101042.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_off00006bf5.bin
bf7201131e6c7a5ce3b28f486941654abd80ab6cd268f2362f5365f92fe8cca6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF5 5632 bytes
font_01_sfnt_off00007f1e.bin
73f8bac4793467754d7b109bc283b02d00caa9ceafb24f6154ab91f45fa53ca1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1E 9992 bytes