Malicious PDF — malware analysis report

Static analysis result for SHA-256 770e6a480a746824…

MALICIOUS

PDF

41.0 KB Created: 2020-08-10 01:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03bb02f0abdd87e8976e78a59e0aaf1e SHA-1: 3301cf891f9baec4838f4a457d92da21dfc711fd SHA-256: 770e6a480a7468242390beadcae51ca800cdbea91e75a49d2ffc7da88dd82b92
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, many of which point to a redirector infrastructure. The primary malicious link, https://ttraff.ru/pify?keyword=oceans+hillsong+guitar+chords+pdf, is presented as a search result for a PDF, likely to trick users into clicking. The ML classifier strongly indicated maliciousness, and the PDF structure itself is indicative of a link farm designed for SEO poisoning or traffic redirection.

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=oceans+hillsong+guitar+chords+pdf
    • http://files.mindfuldemocracy.org/uploads/1/3/1/6/131607047/bazunenawe-lerad.pdf
    • http://files.creammedia.co.uk/uploads/1/3/1/6/131606733/ab66e8.pdf
    • http://files.topskiresorts.eu/uploads/1/3/2/7/132712209/9216625.pdf
    • http://wizavuru.jennsdesignsandphoto.com/uploads/1/3/0/8/130874493/luwegobev.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/street_fighter_alpha_3_rom.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/22420801978.pdf
    • https://cdn.shopify.com/s/files/1/0433/8185/0268/files/35048841271.pdf
    • https://cdn.shopify.com/s/files/1/0437/5537/2695/files/vowabesotopu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/cdf_from_matlab.pdf
    • https://cdn.shopify.com/s/files/1/0440/5769/0262/files/gobavinewagatari.pdf
    • https://cdn.shopify.com/s/files/1/0429/9092/8026/files/68218489843.pdf
    • https://cdn.shopify.com/s/files/1/0434/0829/4044/files/71600104477.pdf
    • https://cdn.shopify.com/s/files/1/0432/8446/3784/files/learn_english_file_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/chakra_cleansing_meditation.pdf
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/aerial_photography.pdf
    • https://cdn.shopify.com/s/files/1/0438/6547/3189/files/27038715292.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6542/files/woxefusunazumumifi.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
font_00_sfnt_off00004ec9.bin
c95d754dfde4703fe7b2a7adb72ebcac5eca3964b24fdbe34a0bba3851b0ec71
pdf-font-stream PDF embedded font (sfnt) at offset 0x4EC9 5324 bytes
font_01_sfnt_off000060d5.bin
ed57c041f2f79f080ce7f36ee66c6ea5e78543796aecb2d4581d5c6edd36894f
pdf-font-stream PDF embedded font (sfnt) at offset 0x60D5 12692 bytes
font_02_sfnt_off000088bc.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x88BC 4324 bytes