Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de9bd61ead33ced…

MALICIOUS

PDF

43.9 KB Created: 2020-08-25 00:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 830be91c262ccd4d2c79c6171da87755 SHA-1: e00288be9cc2eaa5434734eb7b3085b3be4676ec SHA-256: 0de9bd61ead33ced4b7f757bb0635f9a8600588475d3c1f6bc5b112b736cc3a0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lure users into clicking on it. The document body, though heavily obfuscated, contains text related to 'call forwarded message android' and the malicious URL, suggesting a phishing or scam attempt. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the primary malicious destination.

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=call+forwarded+message+android
    • http://files.andrologyamerica.org/uploads/1/3/1/0/131069789/6ab1775.pdf
    • http://gomiw.resources.norledgemaths.com/uploads/1/3/1/6/131606617/vojivusunowiv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/60855780173.pdf
    • https://cdn.shopify.com/s/files/1/0431/2068/9306/files/cds_2020_1_question_paper.pdf
    • https://cdn.shopify.com/s/files/1/0440/0100/1630/files/suwebezojavegizefubuw.pdf
    • https://cdn.shopify.com/s/files/1/0440/1194/6134/files/bifidobacterium_bifidum_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0457/7057/1942/files/fast_swish_sound_effect_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3961/files/67451380574.pdf
    • https://cdn.shopify.com/s/files/1/0433/1080/9256/files/xiguxutuliriwadi.pdf
    • https://cdn.shopify.com/s/files/1/0441/2047/3752/files/harrison_cardiologia.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6092/files/bofupuju.pdf
    • https://cdn.shopify.com/s/files/1/0430/2176/2723/files/vigiza.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000609b.bin
385efec7fa38b74c27f7fb7717a0288776ce8bedc409c9fc3f5de04a93472f52
pdf-font-stream PDF embedded font (sfnt) at offset 0x609B 5052 bytes
font_01_sfnt_off000071bd.bin
4c0f89622284ad3ffce5379e644c849d47e286b9ee231a0728cebf867e32b1c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x71BD 10220 bytes
font_02_sfnt_off000094a8.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x94A8 4324 bytes