Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be2fa1658587999…

MALICIOUS

PDF

57.5 KB Created: 2020-08-09 10:09:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e0043bb67e0934da05a9106c6f34ccc SHA-1: 70dfd51f7c820154812256683e398694e939a5a4 SHA-256: 4be2fa16585879999ed5840b3da38cc63e4d669f3f0ba058f37d3d1172593d9d
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=avadhuta+gita+dattatreya+pdf', suggesting a lure to a malicious site. The presence of a link farm and the ML classifier's high confidence further support malicious intent. No scripts were extracted, limiting the analysis of specific execution behaviors.

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=avadhuta+gita+dattatreya+pdf
    • http://files.sb-defense-lawyer.com/uploads/1/3/0/7/130775205/183164.pdf
    • http://files.impactchristianfc.com/uploads/1/3/0/7/130776609/7cfc53e8d088573.pdf
    • http://files.musicatmainstreet.com/uploads/1/3/0/7/130739839/davetuxu.pdf
    • http://files.returntoyourself.org/uploads/1/3/1/8/131871729/4642f35.pdf
    • http://files.khadijarejdy.com/uploads/1/3/1/4/131407695/xitokopisatoze_kivatokasaziz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3128/1312/files/10402065307.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7621/files/fivikotitumezow.pdf
    • https://cdn.shopify.com/s/files/1/0431/3523/8301/files/26184887059.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2712/files/19992262906.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/28979546301.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63491738983.pdf
    • https://cdn.shopify.com/s/files/1/0440/9648/7576/files/38530598866.pdf
    • https://cdn.shopify.com/s/files/1/0437/1388/8424/files/vewekoxugamigizoxe.pdf
    • https://cdn.shopify.com/s/files/1/0435/5552/0667/files/dunake.pdf
    • https://cdn.shopify.com/s/files/1/0433/7526/3909/files/zenirisabufopoxaximekaki.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8357/files/sudimigedotora.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007331.bin
4b7b7cd704f93a1d269e8148b547ec69b372da5079cd025cbc531221cef0a07d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7331 6472 bytes
font_01_sfnt_off00008348.bin
3669131e0943fd8a92d44e08bac2b93642f9674bcee27defe42fd3b9195f2567		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8348 5244 bytes
font_02_sfnt_off0000952c.bin
5dc0886dfbb2c7431c14a74d09b3577bea796e7b07aca5766199d3644bbec430		 pdf-font-stream PDF embedded font (sfnt) at offset 0x952C 1668 bytes
font_03_sfnt_off00009dcf.bin
bc05c3b0c9efec4bd21185e11108b4d72fac83d2097053529bac33a5b6bbb691		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DCF 11004 bytes
font_04_sfnt_off0000c2a5.bin
56f8cd52b261319b4163b19a72c34c2a5b5b1ab33a966e66262598deb938b29e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A5 16168 bytes

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