Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f7282427703678…

MALICIOUS

PDF

36.9 KB Created: 2020-08-25 13:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45a09206cd21c6432c3ceb499be38e11 SHA-1: 64380416db1fe97990923414ff548dd83a760c2a SHA-256: f6f7282427703678afcd3fa6c27423777f3aa589308fc69b02b0ae59433eece8
120 Risk Score

Malware Insights

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

The PDF document contains a mass external PDF link farm, with many links pointing to benign Shopify URLs but one critical link to a known malicious redirector. The primary malicious URL is https://ttraff.com/pify?keyword=conformational+isomerism+in+cyclohexane+slideshare, which is likely used to redirect the user to a malicious site. The document body text, though heavily obfuscated, contains this malicious URL, suggesting a social engineering lure disguised as academic content.

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=conformational+isomerism+in+cyclohexane+slideshare
    • http://files.valmalencoalpina.com/uploads/1/3/0/7/130738870/98bc027719b2d6.pdf
    • http://files.karmicmoksha.com/uploads/1/3/2/7/132712050/mezan.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/12745503007.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6941/files/10387275891.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/pubadutizimomima.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/fortune_at_the_bottom_of_the_pyramid_summary.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/medarovadujagowurevasote.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/66890871067.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/vibep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/79894841610.pdf
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/69072486184.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/74556815719.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_off000051f3.bin
dcd544ba01df2e3c85df82391e2bcea08112795556cb07568918504792560c4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51F3 5336 bytes
font_01_sfnt_off000063eb.bin
c10c8fc5e9a9e34e242826ab66b3cdb70a81ce3cfcd7922ad00ea20ae5bb843d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63EB 10164 bytes

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