Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed3f948b1895f947…

MALICIOUS

PDF

44.5 KB Created: 2020-08-17 12:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c3291a2f811d8eec3cb712378a37f69 SHA-1: c4d29f52ae3967827525462a33a623d9efd9c3b2 SHA-256: ed3f948b1895f947ce48a7aa816627a0b335ff9225674e4079664594ae64d4a4
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, appears to contain the same URL and references a 'chemical equations worksheet'. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious URL is likely intended to lead the user to a phishing or malware distribution 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.cc/pify?keyword=chemical+equations+worksheet+7th+grade
    • http://files.ewoptx.org/uploads/1/3/2/6/132682892/b1685ad.pdf
    • https://cdn.shopify.com/s/files/1/0429/9191/1066/files/viwegolufutewojaziwoxex.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2871/files/strategic_planning_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/6147/6504/files/68396189380.pdf
    • https://cdn.shopify.com/s/files/1/0434/8860/8418/files/mudorosusureritatawuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/3849/8206/files/mathematical_physics_book_by_hk_dass.pdf
    • https://cdn.shopify.com/s/files/1/0429/3433/7695/files/nujuxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2786/4469/files/prochlorperazine_davis_drug_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/2247/4651/files/lezoxiwamikijevi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0660/files/lidugijogap.pdf
    • https://cdn.shopify.com/s/files/1/0431/2442/4870/files/gixoberarifi.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_off00006c7f.bin
764d449a06f8dd92600d414f493866ac0169e52c85b903dc07adf239bee43a9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7F 5620 bytes
font_01_sfnt_off00007f7c.bin
54f0e6721e68f89a87095028c027fc2d4e405f7483464bf074f5ce69474fc8da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7C 10468 bytes

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