Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab8636b971a201c…

MALICIOUS

PDF

73.1 KB Created: 2020-08-10 13:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8dce4b8ee7e546d4ae87b47dfc936b3 SHA-1: 0c537746dad5f0044b164fa4a32df9220ddd45bb SHA-256: 0ab8636b971a201c66fab02c350479625e0d756adc4a466f0f22ec764d2dfc1e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that point to a known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to disguise the malicious intent. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=diba+barzanji+pdf
    • http://files.ccla-ct.org/uploads/1/3/2/6/132681901/rejil.pdf
    • http://files.elizabethwoodrum.com/uploads/1/3/1/4/131453522/folobajosejurasasa.pdf
    • http://files.liferestorationpartners.com/uploads/1/3/2/7/132741385/zogugapuwepopejosogo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/4015/1454/files/73376800272.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/pogiwomukijeninamefogi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/89271390780.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90442425312.pdf
    • https://cdn.shopify.com/s/files/1/0439/8376/5662/files/lipid_rafts_as_a_membrane_organizing_principle.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6485/files/54301612639.pdf
    • https://cdn.shopify.com/s/files/1/0431/3487/7847/files/dezunulitunuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/8759/2608/files/bombay_high_court_shortlist.pdf
    • https://cdn.shopify.com/s/files/1/0448/1790/7874/files/sarah_s_scribbles_adulthood_is_a_myth.pdf
    • https://cdn.shopify.com/s/files/1/0432/5877/3662/files/degezirofaxek.pdf
    • https://cdn.shopify.com/s/files/1/0430/5672/6170/files/suzif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9029/7507/files/33714601273.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6556/files/algorithmic_trading.pdf
    • https://cdn.shopify.com/s/files/1/0430/9860/3669/files/how_to_uninstall_java_mac.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000df7d.bin
3cfa6fe27879ff3d14c910e9e3bec7c5c94adcd901aca18411c8270769efbe84		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDF7D 31264 bytes
font_00_sfnt_off0000ab32.bin
713d20e2795aee5e9e88f6319870d943b63d01026286d6fe5fc0bcd201f6f7d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB32 5092 bytes
font_01_sfnt_off0000bc9b.bin
772220e3de8264a144dd80fe5db88af631d342d875ae87207abb18632c193c43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC9B 10120 bytes

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