Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc127617180354ed…

MALICIOUS

PDF

59.3 KB Created: 2020-08-17 02:16:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da39d0d5d4c03ad1f3dba332ffd06c06 SHA-1: 3c698ecd4d4b4e29c2c24db7075db6d7f7c7f65a SHA-256: dc127617180354ed4f64aa55167b1cc06d374b9904190c4681ec1fae18841afa
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links, 'https://ttraff.cc/pify?keyword=aashiqui+2+songs+instrumental+music', is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the malicious URL, suggesting a lure to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=aashiqui+2+songs+instrumental+music
    • http://files.metalsanalyzer.com/uploads/1/3/0/9/130969305/0f3c74314f4.pdf
    • http://dufiwaguw.vterryscience.com/uploads/1/3/1/6/131606490/lagujabu-zuviwaponu-fanadino.pdf
    • http://mebiseba.invisiblenm.org/uploads/1/3/1/8/131857631/1796204.pdf
    • http://files.huntingtonlandmark.com/uploads/1/3/1/4/131438038/1863326.pdf
    • http://tedoga.jenisonhighschoolthespians.com/uploads/1/3/2/6/132682790/4a01ed88d91ff.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/3316208739.pdf
    • https://cdn.shopify.com/s/files/1/0439/4080/6811/files/48746529716.pdf
    • https://cdn.shopify.com/s/files/1/0439/4126/5566/files/rubetiwumesepisiwomaz.pdf
    • https://cdn.shopify.com/s/files/1/0448/4333/5837/files/google_play_brand_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0435/0964/5478/files/sumikagesom.pdf
    • https://cdn.shopify.com/s/files/1/0434/6786/6265/files/59625173008.pdf
    • https://cdn.shopify.com/s/files/1/0438/1625/5650/files/14446841451.pdf
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/foneg.pdf
    • https://cdn.shopify.com/s/files/1/0431/0794/2549/files/zesuxogulimigoki.pdf
    • https://cdn.shopify.com/s/files/1/0429/5737/3589/files/3d_model_photoshop.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_off000091dd.bin
63e38386d01e0fdcb1022271f384f85466b0e923300c09662d62e003bf8bf282		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91DD 5340 bytes
font_01_sfnt_off0000a3d2.bin
4ab7cd4e764a38589c605d0c4e50dd3ef17c9ac9c6dd3019669e7e5f80eceaf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3D2 15076 bytes
font_02_sfnt_off0000d27c.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD27C 4324 bytes

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