Malicious PDF — malware analysis report

Static analysis result for SHA-256 07a1fbfc8212296e…

MALICIOUS

PDF

43.1 KB Created: 2020-08-21 05:55:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c17f7657adb89650dac80eb7a31401f8 SHA-1: 94c7b06573161c3cee88ad3f5b5fd44f39d0aa65 SHA-256: 07a1fbfc8212296e2247d6b5eb5820c6332a78f9b28e31cc6b6310724972ab12
154 Risk Score

Malware Insights

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

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.cc/pify?keyword=acting+lessons+apk", suggesting a lure to download potentially malicious content. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malware.

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.cc/pify?keyword=acting+lessons+apk
    • http://dukinifa.grissomchoir.com/uploads/1/3/0/7/130776257/4747669.pdf
    • http://files.reddoorgallerywahpeton.com/uploads/1/3/2/3/132303261/xukepunej-fufixin-rujavatem-rotekerav.pdf
    • http://files.symmetry-careers.com/uploads/1/3/0/7/130740429/1f2a0.pdf
    • http://files.trinibnb.com/uploads/1/3/1/3/131380052/1907250.pdf
    • http://files.utahvalleymagicacademy.com/uploads/1/3/1/0/131070604/159573.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4183/3635/files/xuforegiju.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3250/files/xekizarekuwaviz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2530/9604/files/43195254941.pdf
    • https://cdn.shopify.com/s/files/1/0434/3444/2908/files/hyvee_catering_menu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9649/6544/files/jiviforemojuwedib.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/risuwawawokupasadoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6066/files/gesufugowapusitasoja.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/mobezemiwutugapojoragi.pdf
    • https://cdn.shopify.com/s/files/1/0447/3788/8410/files/gloomhaven_kickstarter_campaign.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/6085015773.pdf
    • https://cdn.shopify.com/s/files/1/0428/4294/7750/files/51093504659.pdf
    • https://cdn.shopify.com/s/files/1/0437/1188/9562/files/worebiwirorof.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_off00005bb6.bin
53bb5295a65cf2d8b4fe18f730ce1ce845777c906c0ce9e6b664850650dc281b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB6 4544 bytes
font_01_sfnt_off00006bb2.bin
99d2ac6f759290a92a41c3cbc4b0ba0a0cab7fc12012b7d298d914155f96d404		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB2 5056 bytes
font_02_sfnt_off00007cfd.bin
d36f099d34e6727cc4bcaf0c387f5482d1b48f364363950a88a2987225fce6c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFD 10200 bytes

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