Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9ef04d513d0dcc…

MALICIOUS

PDF

40.5 KB Created: 2020-07-29 00:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f52fd9049645c2dc116cf2dcf1689909 SHA-1: f937f4b199fb10af556637a0ec8980f1af885739 SHA-256: fa9ef04d513d0dccc3c1e1b0679634e257d02b336d928c6a07f5085c30d274cb
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.cc'. The document body, though partially corrupted, suggests a lure related to a "safety data sheet". The presence of a link farm and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content.

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=fiddly+bits+spray+paint+safety+data+sheet
    • http://files.imaniyoga.com/uploads/1/3/2/8/132814343/gewuwiraje_febovekip_gejupav_xewarus.pdf
    • http://files.publicschool121.org/uploads/1/3/1/3/131384436/761b0.pdf
    • http://files.gccoopre.com/uploads/1/3/1/3/131379578/wisasiruvin-jugemezoxafa-dafazinen.pdf
    • http://files.vibrationalcleaning.com/uploads/1/3/0/9/130969917/d48752f5587c6.pdf
    • http://files.heartlandjungians.org/uploads/1/3/0/7/130776841/ziniruper.pdf
    • http://files.gccoopre.com/uploads/1/3/1/3/
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/witufirudazurudupebudoxi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/46026172510.pdf
    • https://cdn.shopify.com/s/files/1/0429/6726/9532/files/31093960345.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/94743067427.pdf
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/18970446548.pdf
    • https://cdn.shopify.com/s/files/1/0431/7052/9436/files/rulexe.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/pizebujaviso.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zimupumunilojoduwa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9767/0303/files/50764774740.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/lebizenive.pdf
    • https://cdn.shopify.com/s/files/1/0435/0397/6614/files/gadujiluma.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3468/files/59930866716.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_off000060a6.bin
c50cdb186c4b5a742aefc80882b086310cb3e0f82ddc580dbe6a6dd7f9824bc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x60A6 5004 bytes
font_01_sfnt_off00007192.bin
89c0ce7be375038503aa393c5f0147f24f0fe0d6ff888f35d2694d765ac8cf25
pdf-font-stream PDF embedded font (sfnt) at offset 0x7192 10264 bytes