Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1feae10986abf41…

MALICIOUS

PDF

46.4 KB Created: 2020-08-10 22:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffab54917138cafa139c4553b126b8fc SHA-1: 50ef42bb41dc7a642174f0d2bfd5ae524c506acb SHA-256: a1feae10986abf4126a425bd02fa3e26659c75797afcfbd60c9932c2eda3a97f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.com/pify?keyword=assepsia+e+antissepsia+em+pdf'. The document body, though partially corrupted, also contains this URL and numerous other embedded URLs, many hosted on Shopify, suggesting a link farm or content distribution network used for hosting malicious files. The primary attack pattern involves luring users to a malicious site via a seemingly innocuous PDF.

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=assepsia+e+antissepsia+em+pdf
    • http://files.consumerschoicepos.com/uploads/1/3/0/7/130776413/bivon-pigewuvut.pdf
    • http://files.outofthedarknessgriefsupport.com/uploads/1/3/0/8/130813738/3730870.pdf
    • http://files.geras.sk/uploads/1/3/1/3/131380953/4741486.pdf
    • http://files.prosurfschoolhawaii.com/uploads/1/3/1/3/131379591/40190.pdf
    • https://cdn.shopify.com/s/files/1/0437/6687/4266/files/44393738709.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0208/files/koduwabevalenorovupev.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/synonyms_for_overused_words.pdf
    • https://cdn.shopify.com/s/files/1/0435/9448/1821/files/49658004435.pdf
    • https://cdn.shopify.com/s/files/1/0428/7207/8499/files/fojado.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/i_feel_bad_or_badly.pdf
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/morojow.pdf
    • https://cdn.shopify.com/s/files/1/0431/5217/9364/files/60011797684.pdf
    • https://cdn.shopify.com/s/files/1/0427/9091/2159/files/61150675546.pdf
    • https://cdn.shopify.com/s/files/1/0433/2273/6798/files/kuvapoziwonaxepew.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1039/files/literafuguresonozu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4111/1716/files/batuluxipep.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_off000072b4.bin
fb8bbaf28d87b1d0e7d9a1f3d7712f9ba62d03be984a0afc65aa52ac039a3f51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B4 5048 bytes
font_01_sfnt_off000083d2.bin
6350cdacdb389d39b18a8091634012d2d1c0787784689bc9fc92e28e3206b623		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83D2 13316 bytes

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