Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7990aeea5581a3f…

MALICIOUS

PDF

45.1 KB Created: 2020-08-30 09:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faac1a7ea743f73aa171e728c0df3ea4 SHA-1: 30fe635234c08eca19025057df7ef96e162bb186 SHA-256: d7990aeea5581a3f67f248ddae367074e430ece8edb866b5371f0fa33ef37d93
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to funnel victims to a malicious site. The document body, though heavily obfuscated, contains the same URL and a reference to 'no money upfront cpn', suggesting a scam or phishing lure. The presence of numerous other PDF links, many hosted on cdn.shopify.com, indicates a link farm designed to improve search engine ranking for malicious 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/wix?keyword=no+money+upfront+cpn
    • https://static.usrfiles.com/ugd/b8c837_5c9f39ed0de14c4eb5c44c0f4445f9c1.pdf
    • https://static.usrfiles.com/ugd/4826f5_ba5799543eed4b2abd3e4e8530aacfcd.pdf
    • https://static.usrfiles.com/ugd/b8c837_467f2dc5953d4a34aabb7284f47b995b.pdf
    • https://static.usrfiles.com/ugd/238140_d230054063274fd5a48e739a0d07170f.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/genusovubede.pdf
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/healthy_meal_planner.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/5084791907.pdf
    • https://cdn.shopify.com/s/files/1/0432/4642/0136/files/gogoxazosubamijawexutafe.pdf
    • https://cdn.shopify.com/s/files/1/0449/0254/7611/files/balada_para_adelina_partitura_piano_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0431/1023/6321/files/medetisudakedewomukiwide.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1069/files/tukogipavagewesanuluxu.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_off00005cd0.bin
b04ead4ca99e40b7779211a7f6bb43399be3382d617fbf3b7882fa9a4383f20c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD0 4812 bytes
font_01_sfnt_off00006d28.bin
768d9dc311a2b311d1c9ac7c7551ee2c39a42e200b6232fe621da655d8f0e48c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D28 10516 bytes
font_02_sfnt_off00009161.bin
702204e6e3ffdb943e5c3b96557f5ff7c33d4b0b7b24b78c2cb572b47e389d30
pdf-font-stream PDF embedded font (sfnt) at offset 0x9161 16540 bytes