Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1f1d8d1c0bf4249…

MALICIOUS

PDF

45.3 KB Created: 2020-08-25 22:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa518e3c41efa9cb0b9f69bd35d1f58f SHA-1: 1e11a6e4b53584afbc80cd405388dd92cde0fbd1 SHA-256: f1f1d8d1c0bf424969e5ca7ea61feb1775ced7cbddcaaadfabca67b228ed471f
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, predominantly hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The ML classifier also strongly indicated maliciousness. The document body contains text related to 'creative visualisation' and the tool 'wkhtmltopdf', suggesting a potential lure or obfuscation tactic.

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=creative+visualisation+shakti+gawain
    • http://budew.shop-blace.com/uploads/1/3/1/3/131379179/f6b622d93.pdf
    • http://banesak.designsthatfit.net/uploads/1/3/2/7/132740328/3986468.pdf
    • http://files.raynayler.net/uploads/1/3/0/7/130775223/majifaz.pdf
    • http://files.kenziemorganphotography.com/uploads/1/3/2/7/132712214/wivaleva.pdf
    • https://cdn.shopify.com/s/files/1/0430/7763/2149/files/juvenedirofodobatibivov.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/vowidawatuwigi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/gopebujegidobet.pdf
    • https://cdn.shopify.com/s/files/1/0432/7325/7118/files/metefegelis.pdf
    • https://cdn.shopify.com/s/files/1/0430/7809/0901/files/mp4_nagpuri_video_2019.pdf
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/56679744193.pdf
    • https://cdn.shopify.com/s/files/1/0428/0811/5366/files/refediximafufomatuxolifa.pdf
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/verupuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/8433/2710/files/71339785531.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/buvugaripajixilafolezawa.pdf
    • https://cdn.shopify.com/s/files/1/0443/8504/2598/files/ncert_class_10_history_nationalism_in_europe.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_off000074dd.bin
04c5b326d885cb4f7b8fb485e0f021882fdc1bbe9d0c5f3ccacf777477d3b105
pdf-font-stream PDF embedded font (sfnt) at offset 0x74DD 5068 bytes
font_01_sfnt_off00008623.bin
9a1a7f2c3b141169e87270861fd40ee4314b1c225ce3d8d06c10743393e4e089
pdf-font-stream PDF embedded font (sfnt) at offset 0x8623 9988 bytes