Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf1d27fab22d478…

MALICIOUS

PDF

40.4 KB Created: 2020-08-23 11:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4fbda670ddb9781f3ab5d57d4db346b SHA-1: 7bb93fe5a906893333c64daab2a257094f8d804b SHA-256: abf1d27fab22d478b2d76cf24d6aef349cf834692ecb39cbd403285950268b29
150 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, specifically pointing to 'https://ttraff.cc/pify?keyword=animated+knots+apk'. This URL is likely intended to lead the user to a malicious download or phishing page. The document also contains a large number of embedded links, many hosted on Shopify, which is flagged as a link farm. The ML classifier also strongly indicated maliciousness.

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=animated+knots+apk
    • http://files.donnamartelli.com/uploads/1/3/0/8/130813416/3995559.pdf
    • http://files.rebeccanehringpainting.com/uploads/1/3/0/7/130776046/363b8e0b829aadc.pdf
    • http://gagozaf.sevenlayerarmy.com/uploads/1/3/0/7/130739006/91784ea1179425.pdf
    • http://files.clothesforallweather.com/uploads/1/3/1/3/131381109/77bc4407ce25e.pdf
    • http://lewot.zippydogsagility.com/uploads/1/3/1/0/131069992/6378546.pdf
    • https://cdn.shopify.com/s/files/1/0430/8120/3861/files/2016200603.pdf
    • https://cdn.shopify.com/s/files/1/0431/0440/3613/files/bisedopuriduwodubijixa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8824/files/80046155555.pdf
    • https://cdn.shopify.com/s/files/1/0428/6906/3836/files/tuzevekoma.pdf
    • https://cdn.shopify.com/s/files/1/0436/9815/9769/files/65807830348.pdf
    • https://cdn.shopify.com/s/files/1/0433/9272/9246/files/modarosop.pdf
    • https://cdn.shopify.com/s/files/1/0435/9074/6271/files/lumipiwuxigip.pdf
    • https://cdn.shopify.com/s/files/1/0439/6879/0686/files/29746878187.pdf
    • https://cdn.shopify.com/s/files/1/0440/4844/9701/files/side_effects_of_nsaids.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/futikuzazojexopuvenewipu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5587/files/35965265411.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/wild_n_out_episodes.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_off000061e2.bin
0d051086f06635e247ff2a6926c94dd70a367415dee413b96c934ac819fd4a2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E2 5032 bytes
font_01_sfnt_off000072e3.bin
d9048bfdbd1514a43aca0a3e00c6e163f563085d06ed9ba882f0c403a861c2f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72E3 9944 bytes

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