Malicious PDF — malware analysis report

Static analysis result for SHA-256 c956367985b557a1…

MALICIOUS

PDF

51.3 KB Created: 2020-07-31 19:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0971be962007d2bde9d8bbff5bc43269 SHA-1: 71c340eeebdb3bfe04dd3c30d7840f7bc17a266e SHA-256: c956367985b557a1c2b6c2e44628e7868fed3ba13b62078ac753a85e2bd57581
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 are designed to appear as legitimate PDF files hosted on Shopify. However, one of the primary links, https://ttraff.com/pify?keyword=w20+werewolf+pdf, is identified as a known malicious redirector. This suggests the document's purpose is to redirect users to malicious content through a link farm strategy. No scripts were extracted from this sample.

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=w20+werewolf+pdf
    • http://files.g-force2818.com/uploads/1/3/2/7/132712661/3716498.pdf
    • http://files.vermontsingingdrum.com/uploads/1/3/0/8/130874485/2823064.pdf
    • http://files.salondiversions.com/uploads/1/3/2/6/132681201/11eb9746d2eb6.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/deredoniwevonojodovefa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27984898694.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/mixifesarapijidukojegamo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84712881745.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/92044789610.pdf
    • https://cdn.shopify.com/s/files/1/0440/8688/6552/files/lufofuxito.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/mewoxuza.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2214/files/81084002627.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/furajubomakugepidegobila.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/22723936296.pdf
    • https://cdn.shopify.com/s/files/1/0433/3551/6318/files/72317296080.pdf
    • https://cdn.shopify.com/s/files/1/0429/0235/6127/files/mipunavukakiruviwutage.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voxetevew.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_off00007f1b.bin
699de9173c13dd67f5a0e327eb74b2a85390ee16280c97cf24a044f58fdf14e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1B 4580 bytes
font_01_sfnt_off00008ec9.bin
f4230096f4bc457e973c8b7a99ac85a641ea6b4d9e41fda938114888f165dad8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC9 10420 bytes
font_02_sfnt_off0000b276.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB276 4324 bytes

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