Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad4abb60bb7cb47…

MALICIOUS

PDF

48.4 KB Created: 2020-08-19 02:22:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f443f0009e9983213f17a39226e63493 SHA-1: cabdf6d3122b1435771020f4628810a4db054d8e SHA-256: fad4abb60bb7cb475063e337b9e7221be9c302fcf87a91de5b72290b4483bc04
152 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though partially garbled, includes text related to 'daily report format marketing executives' and the malicious URL, suggesting a lure. The ML classifier also strongly flagged this PDF as malicious. The presence of multiple Shopify links, while some are confirmed benign, is part of a larger link farm strategy.

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=daily+report+format+marketing+executives
    • http://womewa.eastcobbrugby.org/uploads/1/3/1/3/131380930/6158322.pdf
    • http://files.chrisbaecker.com/uploads/1/3/1/8/131858540/461f406caf.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/81492050515.pdf
    • https://cdn.shopify.com/s/files/1/0427/7442/9852/files/jafima.pdf
    • https://cdn.shopify.com/s/files/1/0429/8237/5577/files/govovobijekixifesubujor.pdf
    • https://cdn.shopify.com/s/files/1/0440/4042/1541/files/nakuzazutopopurodekozapum.pdf
    • https://cdn.shopify.com/s/files/1/0433/1916/5086/files/gelow.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/78069899351.pdf
    • https://cdn.shopify.com/s/files/1/0432/3508/2402/files/24971058562.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tozonolemudafolafoxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0266/5892/files/vuwopevodubilonojogumag.pdf
    • https://cdn.shopify.com/s/files/1/0434/2382/6085/files/banish_boring_words_free.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_off00006f3b.bin
5b49ee28bc25f9f6217af52fb501a47f7dcceb4378e66dd28a0b5016234d745a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3B 5512 bytes
font_01_sfnt_off000081f9.bin
e90880faaf43364fda2dbacfb7f1137edd64144087de5287cabf285c7c4f826d
pdf-font-stream PDF embedded font (sfnt) at offset 0x81F9 10700 bytes
font_02_sfnt_off0000a652.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA652 4324 bytes