Malicious PDF — malware analysis report

Static analysis result for SHA-256 c740b281a14b8899…

MALICIOUS

PDF

45.0 KB Created: 2020-08-19 11:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b313dab905714c03b16acc4abcf397b4 SHA-1: c85324b94807264f9ff71190807c957ede51aebe SHA-256: c740b281a14b8899eba312a21efc7f123f6396d98c89c421f1780f71204c57d8
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is also present in the document body and is likely the primary lure. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack pattern involves tricking the user into clicking the malicious link.

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.ru/pify?keyword=beepstreet+sunrizer+manual
    • http://files.missmiddlegausa.com/uploads/1/3/1/3/131380305/6755487.pdf
    • http://wisik.coastguardinvestigativeassociation.org/uploads/1/3/2/6/132682883/5618443.pdf
    • http://borun.glovarnet.shop/uploads/1/3/0/9/130969757/4432749.pdf
    • http://files.newmapsoftheoldwest.com/uploads/1/3/0/7/130775032/nopamusoku_bisova_domewewofu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/tupowekavoge.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/yoga_poses_for_flexibility_and_strength.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/88627052266.pdf
    • https://cdn.shopify.com/s/files/1/0429/5481/7690/files/26116388634.pdf
    • https://cdn.shopify.com/s/files/1/0433/6458/1525/files/nufebivamuluti.pdf
    • https://cdn.shopify.com/s/files/1/0436/1483/0749/files/roparipinupofu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/55025258542.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/32874282911.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_off0000739b.bin
532ac3ee454852fd8710feb66e4e014ac752e31ebef674bf6cf08122f88ec918		 pdf-font-stream PDF embedded font (sfnt) at offset 0x739B 5064 bytes
font_01_sfnt_off000084c0.bin
9fefe2b91cfe82dff9a369b196ff4f098d47d03c8683bb33b9d930c8eb29c010		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84C0 10228 bytes

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