Malicious PDF — malware analysis report

Static analysis result for SHA-256 737fd37ea6859ac0…

MALICIOUS

PDF

63.3 KB Created: 2020-08-15 12:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 246936457aa7ab4fa417267c14eb1d29 SHA-1: 112d681723b5ab2fd83564a290c176a104cedd1b SHA-256: 737fd37ea6859ac042eb49ee594751d014bedd95a48c15761d24299c9906e18b
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one identified as a known malicious redirector. The document body itself contains obfuscated text and URLs, suggesting an attempt to lure users to malicious sites. The primary malicious indicator is the link to `ttraff.ru`, which is flagged as a malicious redirector, likely part of a phishing or scam campaign.

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/wb?keyword=ad&d%20demihuman%20deities%20pdf
    • http://files.tmoonphotography.com/uploads/1/3/1/3/131380616/fasugi_zesukipexoxiji.pdf
    • http://files.gregsculpture.com/uploads/1/3/2/7/132710743/75712.pdf
    • http://files.diamonddoorltd.com/uploads/1/3/1/6/131607575/luxum_levageb_fukoxomoxazi_sadetasokop.pdf
    • http://dukowa.cancercantkilllove.com/uploads/1/3/1/4/131406286/gijasu-bavisipekamuz-winagavamigujev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0431/6246/8516/files/mawegetifixuwiroberu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/19056531597.pdf
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/93478654732.pdf
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/rosofo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2690/6264/files/bakifufawakodo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/39333759299.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/gokow.pdf
    • https://cdn.shopify.com/s/files/1/0429/8955/1770/files/diwute.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/87393744573.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5156/files/jorapizodopiviba.pdf
    • https://cdn.shopify.com/s/files/1/0432/2240/1185/files/tisizokemanurilefapamidur.pdf
    • https://cdn.shopify.com/s/files/1/0433/8237/4561/files/bugusizafafilarerovi.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009a44.bin
de9814b747036134b18a53129b8d086b4620b0c6ff081e531b2c2c6b7f2391e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A44 3456 bytes
font_01_sfnt_off0000a69a.bin
44a0dd78b982d942255dd732a778c11360cf4581a474d58c50d179ed6d23ab57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA69A 3612 bytes
font_02_sfnt_off0000b290.bin
1f07170aae4b9da34f7c6cdb36d01e7f2c3127bbbbc93f80f55f54a8a36b7257		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB290 10900 bytes
font_03_sfnt_off0000d70f.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD70F 4324 bytes
font_04_sfnt_off0000e510.bin
f327080339805a32810fb90cf83a0e4a42c5270287e902880b1e0aa42acdebf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE510 2660 bytes

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