Malicious PDF — malware analysis report

Static analysis result for SHA-256 3da2e81eb2d7a4ce…

MALICIOUS

PDF

42.0 KB Created: 2020-08-10 05:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 665948b9a0796dd190c7914491479485 SHA-1: 3ec0cbf9ebacb748fb2bfa692895d22c255c1ae2 SHA-256: 3da2e81eb2d7a4ce41ca42e97e422b65e5ba88be190f84536c1ff064e17e6fe2
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'https://ttraff.ru/pify?keyword=alimentos+ricos+en+yodo+pdf'. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a large number of external PDF links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same malicious redirector URL and benign-looking PDF filenames, suggesting a lure to a malicious site.

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=alimentos+ricos+en+yodo+pdf
    • http://files.efficientsolardesign.com/uploads/1/3/1/4/131452942/zewok.pdf
    • http://taditifup.hrr-poa.com/uploads/1/3/1/1/131164250/3d398.pdf
    • http://files.stalselem.org/uploads/1/3/2/7/132740515/vuwuxinopojuj_torofidugosarab_wobubufevefibu_vabadopejajo.pdf
    • http://files.mobilebirdgrooming.net/uploads/1/3/0/7/130776351/371a096d.pdf
    • http://files.edgewaterasset.com/uploads/1/3/1/8/131871780/1778047.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/37604868145.pdf
    • https://cdn.shopify.com/s/files/1/0438/3748/9309/files/9976869742.pdf
    • https://cdn.shopify.com/s/files/1/0435/5401/3336/files/10956603003.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3636/files/sims_3_brothel_mod.pdf
    • https://cdn.shopify.com/s/files/1/0434/5993/6421/files/48363926097.pdf
    • https://cdn.shopify.com/s/files/1/0439/1718/1083/files/80_bpm_acapella.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/zesosuberovu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9849/5389/files/nixukemefufaxema.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4107/files/zevasowe.pdf
    • https://cdn.shopify.com/s/files/1/0435/9343/3246/files/fukaxefisokosuzazitiw.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1144/files/45454668715.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_off00006429.bin
ec607b2f072397e9ccce84d126d6f4b71b5b48c87852f4efc30ddcac5683932d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6429 5180 bytes
font_01_sfnt_off000075c2.bin
7d085b626cc20a74ead52da7120efa88da260145b7620b58f2c8d177384195a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C2 11148 bytes

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