Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae07ecbfcca79304…

MALICIOUS

PDF

44.7 KB Created: 2020-08-27 19:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad9bc7967e6ca7035923c4606df49167 SHA-1: 1f8adc7c6b560f3e10ee3c71b5229d589f8adb98 SHA-256: ae07ecbfcca79304c8c6c024ed368780ef05f5786bcad4c76449fdb586c49ec9
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one prominently pointing to a redirector URL associated with malicious activity. The document body, though partially obfuscated, contains text related to "driverpack offline full version", suggesting a lure for software downloads. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to improve search engine ranking for malicious content. 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.ru/pify?keyword=driverpack+offline+full+version
    • http://files.jsfarnsworth.net/uploads/1/3/0/7/130738559/b1840b95eb8c.pdf
    • http://files.hinghamwomensclub.org/uploads/1/3/1/4/131437380/nereguxivo.pdf
    • http://files.grimmplayers.com/uploads/1/3/0/8/130874231/dobipegodak.pdf
    • http://govupano.energycyclingclub.ca/uploads/1/3/2/6/132683173/larisasenex.pdf
    • https://cdn.shopify.com/s/files/1/0433/5940/4197/files/sulopupefuvaxoxuwon.pdf
    • https://cdn.shopify.com/s/files/1/0432/2616/9503/files/jukemul.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71409998288.pdf
    • https://cdn.shopify.com/s/files/1/0459/2192/7319/files/gutoba.pdf
    • https://cdn.shopify.com/s/files/1/0431/5057/3719/files/81635181096.pdf
    • https://cdn.shopify.com/s/files/1/0428/5195/8947/files/84741407093.pdf
    • https://cdn.shopify.com/s/files/1/0433/6992/2714/files/poloselunowa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6320/6307/files/aurelion_sol_guide_mobafire.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00006358.bin
48cc19b9956871606bdc1bec4c9b49fa40d9b0c34e917b3cc06351c67cbadc4a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6358 11624 bytes
font_00_sfnt_off000051d0.bin
0c64d32ecb3d507464178fc6d3d4712d5f69adf971ce9b988e2a0f3607d0cb2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51D0 5132 bytes
font_02_sfnt_off000083e3.bin
f9e5b29d4ed1fd67a51f8877f21cb4845aaab5057c31cfc910888d16978f673d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83E3 9888 bytes

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