Malicious PDF — malware analysis report

Static analysis result for SHA-256 d005c27c08f688ab…

MALICIOUS

PDF

144.8 KB Created: 2020-08-03 00:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 221981816444c54c1c21780a0fc64d72 SHA-1: a2c73e0fea736aea82d5ffb0fce2ad0b92dbc1ad SHA-256: d005c27c08f688ab551636fbc9e62c2d101ddbd556d06c0bc8187cd1978a591b
154 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 'https://ttraff.cc/pify?keyword=80s+anime+boy'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=80s+anime+boy
    • http://files.inplaypilates.com/uploads/1/3/1/3/131384604/zifivagi-nelobus-tabixu.pdf
    • http://files.plottwist747.com/uploads/1/3/1/3/131398143/8898244.pdf
    • http://files.albertaplaidgalloway.ca/uploads/1/3/0/7/130775429/05f7e8cb.pdf
    • http://files.audio4n6.ca/uploads/1/3/1/8/131856725/f7bd285c82ce3cf.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/gixeforirovefinosulewe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/37354909059.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovetutokukike.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/98102274182.pdf
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/bosofafozil.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6787/files/nupoxuna.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/kabenimunategetazifogebid.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/24881957944.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53522836856.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/gunejizuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/3317/2885/files/grouped_bar_chart.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/18149391244.pdf
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/sibenekibemamokaze.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_off00017e28.bin
4ee1e3ad41a480f48b9abfabaf28821ee977fcadbdcf8760a242dfd4b31647a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17E28 37720 bytes
font_01_sfnt_off0001f339.bin
14ecbad6a908039ef03877c4312085148df1a66fec2b1d9e4ee9948d3f4a4be4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F339 5188 bytes
font_02_sfnt_off000204d0.bin
5d98632ec3f0fbc13f75ab4e143872e76264f43332db5bebd8f65a0aa2ffa273		 pdf-font-stream PDF embedded font (sfnt) at offset 0x204D0 15672 bytes

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