Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bbfd3b48f006831…

MALICIOUS

PDF

39.1 KB Created: 2020-08-18 16:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4ea7f2f9e6e4743f9695dcf51d45d4b SHA-1: 55f1d460008f56abc84ebaea8694384fd4713644 SHA-256: 2bbfd3b48f006831f7669385eda7d131b261972a82f4814e5e5da632458c142c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=bungee+jumping+video++free'. This URL is presented within the document body, disguised as a free video download lure. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm designed to distribute malicious content or engage in SEO manipulation for malicious purposes. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=bungee+jumping+video++free
    • http://files.carlosplusplus.com/uploads/1/3/1/6/131636954/fodesinonar_pukezoze_texuvojubog_giwujobuk.pdf
    • http://files.krishyoga.com/uploads/1/3/1/0/131069904/3929698.pdf
    • http://files.eatsugarsalt.com/uploads/1/3/0/8/130813409/galekazasobubimepux.pdf
    • http://files.chartierpropertymgmt.com/uploads/1/3/1/3/131379540/4a3626593c1c9.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/reorder_pages_adobe_acrobat_pro.pdf
    • https://cdn.shopify.com/s/files/1/0434/5639/7464/files/11273939972.pdf
    • https://cdn.shopify.com/s/files/1/0437/7932/6103/files/lubosufuketolipubojuxogit.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5190/files/29864580078.pdf
    • https://cdn.shopify.com/s/files/1/0434/8801/8594/files/jizebuti.pdf
    • https://cdn.shopify.com/s/files/1/0432/4445/4051/files/gazanojosazasofip.pdf
    • https://cdn.shopify.com/s/files/1/0435/1682/1672/files/48443133361.pdf
    • https://cdn.shopify.com/s/files/1/0448/4136/9761/files/xadexuviwarixevugibar.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0987/files/roporepegudosuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13652925252.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_off00005cab.bin
3a40ad94a76499520be2045a53df3f93efca31a5b96d387c5658c0b8f1136433		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CAB 5128 bytes
font_01_sfnt_off00006e18.bin
67c3a410970e843402fae90f78bc2818ba6e08b41ec7544e42bcf7717263599c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E18 9784 bytes

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