Malicious PDF — malware analysis report

Static analysis result for SHA-256 de33f7b1dd6ca45f…

MALICIOUS

PDF

43.4 KB Created: 2020-08-19 05:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1199f5da407c54d341e3b552e92c51e3 SHA-1: 2c420ddbe7709b8153df40cd625dba8f2df14a90 SHA-256: de33f7b1dd6ca45f8f911b9c12261dc2de488af9641578e4a3f4aa9d7699ec18
152 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 pointing to 'https://ttraff.com/pify?keyword=mts+admit+card+delhi+2017'. Additionally, it exhibits a PDF link farm heuristic, with many links pointing to Shopify domains, suggesting an attempt to distribute content or host malicious files. The ML classifier strongly flagged this PDF as malicious. The document body contains text related to 'Mts admit card delhi 2017' and the malicious URL, reinforcing the lure.

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.com/pify?keyword=mts+admit+card+delhi+2017
    • http://files.zuntzmusic.com/uploads/1/3/1/8/131856498/2747609.pdf
    • http://files.equilibranthealth.com/uploads/1/3/2/8/132814400/gefumepuri.pdf
    • http://files.pheasantruncavaliers.com/uploads/1/3/0/9/130969061/fbb0f40.pdf
    • http://jinanu.edgewaterbiblechurch.com/uploads/1/3/1/4/131412032/6144796.pdf
    • https://cdn.shopify.com/s/files/1/0431/6718/7108/files/ai_to.pdf
    • https://cdn.shopify.com/s/files/1/0432/7420/7387/files/moxosewepupujebeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/11228270549.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/fundations_grade_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2799/files/59133348195.pdf
    • https://cdn.shopify.com/s/files/1/0430/4958/2743/files/ximofaveki.pdf
    • https://cdn.shopify.com/s/files/1/0429/0881/1427/files/amulet_of_the_pit_lord.pdf
    • https://cdn.shopify.com/s/files/1/0436/0149/4178/files/dotuzotipagasunudiruxujol.pdf
    • https://cdn.shopify.com/s/files/1/0432/1057/1940/files/3095008509.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56751463133.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_off00005fba.bin
01d44b5ee5504733c63ac86e6e4c27bc3d62405e1d855a6fff84d21407fde395
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBA 5592 bytes
font_01_sfnt_off00007294.bin
73983ccd477f0e4c07634362c0f9f13a23cea415a26bff37f7f125d59a681190
pdf-font-stream PDF embedded font (sfnt) at offset 0x7294 1936 bytes
font_02_sfnt_off00007bd7.bin
830447c6e4ee0e33f34e0f205d6a1d8e60640e0d34aa8ebd7f1b00275eda12d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD7 10684 bytes