Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ae0cb5113b4a5a…

MALICIOUS

PDF

45.8 KB Created: 2020-08-08 17:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8881a4dba2f3ab2497aebd7ffd3f397a SHA-1: 2f985bb771913e99441001cebb4e2f7751732f70 SHA-256: d8ae0cb5113b4a5a80bf8ad7864f7313df3996c2354e02117ed5a64b802840ac
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic firing indicates a direct link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=the+ultimate+boa+constrictor+care+guide+pdf'. The document body, though heavily obfuscated, contains this URL and other Shopify links, reinforcing the lure. The primary intent appears to be redirecting the user to malicious infrastructure.

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.ru/pify?keyword=the+ultimate+boa+constrictor+care+guide+pdf
    • http://files.hawaiiafterschoolalliance.org/uploads/1/3/1/4/131453329/boxegikebevadi-varulixebowopu-lagebelu-jopis.pdf
    • http://files.charleyshairdressing.co.uk/uploads/1/3/2/6/132695629/gawusezijotavaluz.pdf
    • http://files.csbridalstudio.com/uploads/1/3/0/7/130775921/vitalo_xuzovalavabuk_fularewanam_maboteguxosirux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56655156305.pdf
    • https://cdn.shopify.com/s/files/1/0435/6984/0283/files/nejirapi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6479/5044/files/nike_brand_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0429/2516/2652/files/better_self_journal.pdf
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/96616825789.pdf
    • https://cdn.shopify.com/s/files/1/0431/4464/2715/files/susapebom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7780/files/poesias_fernando_pessoa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9711/files/11180522736.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8535/files/bodufuvonovu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5252/3929/files/wofiwewedevurelawedowi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9735/7472/files/git_merge_last_two_commits.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3870/files/riwof.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_off0000737f.bin
d370123c96eeedba5b16921ea6839850863c87b2b39f5eaeb8733073126b13f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x737F 5660 bytes
font_01_sfnt_off00008687.bin
e1ba9bded3d2a5b34a2f6d800b4e7277e4b74a4668cabd2d1895f5879c9ab69e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8687 10352 bytes

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