Malicious PDF — malware analysis report

Static analysis result for SHA-256 98096f56ea88ab2a…

MALICIOUS

PDF

46.2 KB Created: 2020-08-03 15:36:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f758dffaba2c2250f998fff907327b85 SHA-1: 6d2f9ca029432f042ecd20c595a034a5a340b164 SHA-256: 98096f56ea88ab2a20fcb8b8d65b0f6a8ae7a6bedc4a8d6b2253608a9d02f980
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to the known malicious redirector 'ttraff.com'. The ML classifier also strongly indicated maliciousness. The document body appears to be malformed or obfuscated, but the presence of the malicious URL is a strong indicator of a phishing or redirection attempt.

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=anomalous+verbs+pdf
    • http://files.thebeautybarnuk.com/uploads/1/3/1/6/131607029/a0078fe448f.pdf
    • http://files.krystlewong.com/uploads/1/3/1/4/131437669/kiwasutemumowod_rejeki.pdf
    • http://files.thislittlepiggyminis.com/uploads/1/3/1/4/131438079/6314199.pdf
    • http://files.homefirebooking.com/uploads/1/3/0/8/130873923/3894413.pdf
    • http://files.inspirationfinearts.org/uploads/1/3/1/6/131636935/bagebi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23281911610.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/ruzigojagurep.pdf
    • https://cdn.shopify.com/s/files/1/0433/4472/4133/files/83892985648.pdf
    • https://cdn.shopify.com/s/files/1/0430/0354/3715/files/81333942221.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21086069096.pdf
    • https://cdn.shopify.com/s/files/1/0434/0852/3416/files/12523826858.pdf
    • https://cdn.shopify.com/s/files/1/0429/2401/5783/files/74138536852.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/papal.pdf
    • https://cdn.shopify.com/s/files/1/0431/3301/0082/files/logavuxuzebiba.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7755/files/c_clear_console.pdf
    • https://cdn.shopify.com/s/files/1/0430/9663/7597/files/67166507692.pdf
    • https://cdn.shopify.com/s/files/1/0434/0380/4839/files/xazisak.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53940391871.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_off0000605e.bin
4f6082941906317c05b6391ad6554b2c755fb97c67e9bbce71abb774fde7bb60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x605E 5376 bytes
font_01_sfnt_off0000728e.bin
0a13bd66b12724fd0fe9e74642a7527f854b19c86c80cc528d50339179dabfab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x728E 10236 bytes
font_02_sfnt_off00009558.bin
7c12020f0b25e69e85aef4ec85e669d6998e273adc80204ab17be37992fd0bdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9558 16096 bytes

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