Malicious PDF — malware analysis report

Static analysis result for SHA-256 246a20d06ce17356…

MALICIOUS

PDF

36.3 KB Created: 2020-08-14 20:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb1632bda1e7216460b268484e7ab5a2 SHA-1: 6347476f63f8116b0a2968742684fb6a64211aa5 SHA-256: 246a20d06ce17356de1f85cda6cff29bb1a8527160287c5973fbb9b3d9eec80f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a critical redirector link to 'ttraff.ru', indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the target URL 'https://ttraff.ru/pify?keyword=angrily+crossword+answer'. This suggests the document is designed to lure users into clicking the malicious link, likely leading to further malware download or credential harvesting. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.ru/pify?keyword=angrily+crossword+answer
    • http://files.twingingit.com/uploads/1/3/1/4/131453645/3502f6b95.pdf
    • http://xefed.wakelandcolorguard.org/uploads/1/3/0/7/130775429/9fe4f5476fcb.pdf
    • http://rudawoj.rlbciviccenter.com/uploads/1/3/1/4/131437089/2798543.pdf
    • http://files.purplelotusspiritualhealinginc.com/uploads/1/3/1/6/131606025/3808512.pdf
    • http://gavum.schoolhouseportal.com/uploads/1/3/0/9/130969360/nekesavapuruwup.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1084/files/blood_pressure_scale.pdf
    • https://cdn.shopify.com/s/files/1/0435/0024/1061/files/pisalabegugogodu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6285/3794/files/84312738396.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37638787324.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/askep_blighted_ovum.pdf
    • https://cdn.shopify.com/s/files/1/0437/5085/0709/files/41347025241.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65039204935.pdf
    • https://cdn.shopify.com/s/files/1/0440/0077/2254/files/vuvetetinuwezonefu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8907/5102/files/78037250309.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/84317724695.pdf
    • https://cdn.shopify.com/s/files/1/0437/7218/2685/files/83328365583.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_off000044f6.bin
4017cef986df022bc40b621e8ff1abfa57677e8c11e3cfb32508f50f0260ed9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44F6 5000 bytes
font_01_sfnt_off000055f7.bin
b690d3663a28c774ae92c92574d5b82ec541b8cf62f152cfd7022ca292c19b31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55F7 9448 bytes
font_02_sfnt_off00007668.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7668 4324 bytes

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