Malicious PDF — malware analysis report

Static analysis result for SHA-256 85abcb8e7725b945…

MALICIOUS

PDF

46.6 KB Created: 2020-08-07 08:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 385213c0c91a690c67bee1a6ce142827 SHA-1: 81b619a698ce27a73891899db0a8aed08b1752dd SHA-256: 85abcb8e7725b9456005da462daef2ea670696fdab2f5f59e6d9d6750c05dbd5
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 redirector service known to host malicious content. The document body itself contains obfuscated text and references to a specific PDF topic, likely to improve search engine ranking and lure unsuspecting users. The primary malicious URL identified is https://ttraff.cc/pify?keyword=varicela+complicada+en+adultos+pdf, which is flagged as a malicious redirector.

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=varicela+complicada+en+adultos+pdf
    • http://xuxofa.grantstelephoneclassics.com/uploads/1/3/1/1/131163635/nupasikod_fokuniri.pdf
    • http://files.beacontheatreworkshop.org/uploads/1/3/1/3/131383664/cee3c5.pdf
    • http://files.andrewbixler.com/uploads/1/3/1/4/131453053/ab784de509.pdf
    • http://files.growingwithbrock.ca/uploads/1/3/1/3/131381374/8586130.pdf
    • http://files.catrinatenganartistry.com/uploads/1/3/0/7/130738696/cbbab214db61.pdf
    • https://cdn.shopify.com/s/files/1/0434/7346/9597/files/dukakogunenaromokilefeki.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48465164240.pdf
    • https://cdn.shopify.com/s/files/1/0431/8507/8434/files/19561998360.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/tutejaxodopotetizoras.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/voxexodufi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0088/7457/files/equality_and_diversity_training.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/16338595687.pdf
    • https://cdn.shopify.com/s/files/1/0433/0966/2366/files/73534576938.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/29233708743.pdf
    • https://cdn.shopify.com/s/files/1/0448/0784/8096/files/rules_of_active_and_passive_voice_with_examples_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/7844/9307/files/276339546.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/tutorial_carding_amazon.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_off00007696.bin
d876152c944156058d012b6b3f5e9bfd65ae82430ccf1eb7139a13a96513681d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7696 5264 bytes
font_01_sfnt_off0000886a.bin
700b3bc1e7b4fee0c9af1aafdefd5256139e35edb9ab7402474e06f0faa3d63d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x886A 10708 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.