Malicious PDF — malware analysis report

Static analysis result for SHA-256 282ff9308ef8f50c…

MALICIOUS

PDF

40.6 KB Created: 2020-08-19 02:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4afc8ed2dd89fca865705d009f5b717 SHA-1: 31994c56117295071a974c27afeed9c46b54eae7 SHA-256: 282ff9308ef8f50c3640bdb4b71679b9cc87e19588ec26ea6aee61eba8cd8138
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=imci+latest+guidelines+pdf', which is identified as a malicious redirector. The presence of numerous embedded links, many pointing to potentially compromised or malicious domains, strongly suggests an intent to lure users to malicious sites. No scripts were extracted from this sample.

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=imci+latest+guidelines+pdf
    • http://files.originalsexyslave.com/uploads/1/3/0/9/130969004/ca2abe.pdf
    • http://vezol.hollyhmiddouche.com/uploads/1/3/0/7/130776738/b6f02a1f673.pdf
    • http://files.jhunterdata.com/uploads/1/3/1/4/131453645/tijunugakelidufe.pdf
    • http://taziduw.modicash.nl/uploads/1/3/0/7/130738870/6835161.pdf
    • http://files.newpentecost.net/uploads/1/3/0/7/130776131/poworanevu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1053/8147/files/sound_energy_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/45238625765.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/93367494659.pdf
    • https://cdn.shopify.com/s/files/1/0435/0217/4374/files/31703845972.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/10429531101.pdf
    • https://cdn.shopify.com/s/files/1/0435/7016/7967/files/cricut_explore_air_2_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6627/7534/files/apple_airport_time_capsule_3tb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gibowutobarifokegibig.pdf
    • https://cdn.shopify.com/s/files/1/0430/6891/5863/files/falixoxiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/7461/6473/files/author_s_purpose_activities.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/97221050886.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_off000060f7.bin
8f99e49485f716e56506b96911ce35c29b05249f5ceda40ce0686811a79b9360		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60F7 5316 bytes
font_01_sfnt_off000072f4.bin
67e38f9034cc195aa5a0737ad9ebd546e0ee60223109418679b20a3bcf507253		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F4 10096 bytes

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