Malicious PDF — malware analysis report

Static analysis result for SHA-256 4974b6613696693f…

MALICIOUS

PDF

43.8 KB Created: 2020-08-15 01:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ef5adf4b601c2603709cae8c62ba88e SHA-1: 5088736040d39137dd498173e29d2e28c853aff4 SHA-256: 4974b6613696693f79cf449c007a8280401b3aad64537154e7b3d6b1a2e1b599
152 Risk Score

Malware Insights

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

The PDF contains a prominent link to a redirector URL, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains text related to 'purchased audiobooks on iphone' and the malicious redirector URL, suggesting a lure to trick users into clicking the link. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm used for SEO poisoning or distributing further malicious content.

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=purchased+audiobooks+on+iphone
    • http://files.chequersracers.com/uploads/1/3/0/7/130739537/4998625.pdf
    • http://zeweb.yogashak.com/uploads/1/3/0/7/130739274/tudikob.pdf
    • http://files.c60ultrapure.com.au/uploads/1/3/1/3/131398530/sasezopunuvi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/radamasake.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2950/files/16691822811.pdf
    • https://cdn.shopify.com/s/files/1/0433/9462/9786/files/juvenile_delinquency_a_sociological_approach.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/65260602784.pdf
    • https://cdn.shopify.com/s/files/1/0431/6151/8231/files/85499824740.pdf
    • https://cdn.shopify.com/s/files/1/0429/7824/6815/files/83576950533.pdf
    • https://cdn.shopify.com/s/files/1/0428/0185/6668/files/sepibavipewawagolufabal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45927795399.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6063/files/23517589512.pdf
    • https://cdn.shopify.com/s/files/1/0433/3872/7589/files/23322564606.pdf
    • https://cdn.shopify.com/s/files/1/0431/6522/1028/files/filofosofejoj.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d53.bin
acfcdf24e0da09399e0ea1208b3a7014d7057923506071a262d20d98dc985d89
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D53 5332 bytes
font_01_sfnt_off00007f59.bin
05f13e0b3602ac3af17d5f15c0a568a995433ca6765e60208ae8f14ae876244e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F59 10404 bytes