Malicious PDF — malware analysis report

Static analysis result for SHA-256 723790520be9ee9e…

MALICIOUS

PDF

57.7 KB Created: 2020-08-12 07:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 311b3ae1cf719bad5e96ecdb098aaeac SHA-1: 722dd9b97634cafeb3717df82c5bb28cf08c5542 SHA-256: 723790520be9ee9ec986732db6af49592a4491cf46c3f5f5d746aa2d8baf2cba
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector infrastructure (ttraff.com) that is flagged as malicious. This redirector likely leads to a large collection of PDFs hosted on Shopify, potentially for SEO manipulation or to distribute further malicious content. The document body itself contains obfuscated text and URLs, suggesting an attempt to disguise its malicious intent. No scripts were extracted, but the presence of malicious redirectors and a link farm indicates a probable phishing or content distribution scheme.

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=compendium+of+the+catechism+of+the+catholic+church+pdf+download
    • http://files.usaqingshan.com/uploads/1/3/1/1/131164048/datinavoxojozenaxa.pdf
    • http://files.lambdalambdasigma.org/uploads/1/3/0/8/130813428/65629a9c1bde.pdf
    • http://files.chinditslongcloth1943.com/uploads/1/3/0/8/130813325/713743308a4f9d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/5815/0046/files/sofozexigamujazima.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2857/files/xofiziputoronerisemo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7485/5846/files/tizovidadovawikatof.pdf
    • https://cdn.shopify.com/s/files/1/0430/8048/2970/files/glucose_biosensors.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/integral_calculus_sample_problems_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0431/6443/4583/files/79382112442.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68905528383.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.pdf
    • https://cdn.shopify.com/s/files/1/0432/4871/3896/files/32969860996.pdf
    • https://cdn.shopify.com/s/files/1/0432/8321/8588/files/championnat_du_monde_athltisme_2020_programme.pdf
    • https://cdn.shopify.com/s/files/1/0428/5811/9334/files/zipimewikejezel.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/50052938781.pdf
    • https://cdn.shopify.com/s/files/1/0428/2905/4118/files/63343619006.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5447/files/tejunazapaxas.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a27b.bin
cc574ab9bc74d87af1153cf267d50d3aab884064bcfebe08015fdef64f7000e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA27B 5392 bytes
font_01_sfnt_off0000b4af.bin
70bd1eecb4737f2b9e8641b85719ca693031a15422584c88c78bf92518fb25b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4AF 10716 bytes

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