Malicious PDF — malware analysis report

Static analysis result for SHA-256 f431ee779a25abbb…

MALICIOUS

PDF

41.9 KB Created: 2020-08-23 00:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d75d4ed7897f11772decac9f7cf7b7b SHA-1: edab5e3082fc0eeeb80ffc42dd03647cb56d40aa SHA-256: f431ee779a25abbb75b6cf4321dc33a38e6490d5ace9921433d3e5821caeca5b
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to 'ttraff.com', a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack pattern appears to be the distribution of malicious links within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=valkyrie+profile+psp+iso
    • http://vejug.albanyareacatholiccommunity.org/uploads/1/3/0/8/130815097/f3644eb2.pdf
    • http://files.fenianfear.com/uploads/1/3/0/9/130969357/telurus.pdf
    • http://gukete.earthmothermidwife.com/uploads/1/3/1/4/131437462/liwutoj_nifaxa_xuvogome_didex.pdf
    • http://gupax.zoehounta.com/uploads/1/3/2/7/132741100/c07b8848ba.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/18747951550.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/40274124128.pdf
    • https://cdn.shopify.com/s/files/1/0440/7037/1493/files/books_to_learn_spanish_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/vamavowagitifesobuwumor.pdf
    • https://cdn.shopify.com/s/files/1/0433/8391/4654/files/bowen_university_school_fees.pdf
    • https://cdn.shopify.com/s/files/1/0433/7706/6145/files/libro_cerebrito_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/lupow.pdf
    • https://cdn.shopify.com/s/files/1/0430/6806/3895/files/80647042420.pdf
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/let_it_go_piano_easy_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/7312/7079/files/wopanitezi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6870/3398/files/all_souls_day_prayer.pdf
    • https://cdn.shopify.com/s/files/1/0432/4353/6541/files/10740818265.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_off00006348.bin
d70244b2dc07c1983263025462638d7dff57a05322f27a84caa85c05e6287ee7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6348 5028 bytes
font_01_sfnt_off00007479.bin
54a325042beb75329aa6b365788fbd832abf224edc4015982b3628b78bd38e97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7479 11444 bytes

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