Malicious PDF — malware analysis report

Static analysis result for SHA-256 60300716e3ff7f25…

MALICIOUS

PDF

45.2 KB Created: 2020-07-14 11:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd02cf52ee09d035ca7135daecdf2237 SHA-1: 356acfdc282b486a4c07535211876e7068b1d41b SHA-256: 60300716e3ff7f25af28e443b7d8dabeadb6691d80966ffdeac143e8986fbe17
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to WordPress sites with numeric slugs, indicating a link farm for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.ru'. While no scripts were extracted, the PDF structure and link farm suggest an attempt to redirect users to malicious content, likely as part of a phishing or malware distribution 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=universalisation%20of%20elementary%20education%20pdf
    • http://files.infiniterootsofwisdom.com/uploads/1/3/2/8/132815854/vezozelojoj-kujaw.pdf
    • http://files.votemikeclark.com/uploads/1/3/1/4/131438068/9984358.pdf
    • http://files.kmrandallauthor.com/uploads/1/3/1/1/131164421/a679f10bb.pdf
    • http://files.innerframework.org/uploads/1/3/1/0/131070526/wudifujasiribodiwim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://rojejimij901227669.files.wordpress.com/2020/06/53451614641.pdf
    • https://kanebiduseme.files.wordpress.com/2020/07/46231677151.pdf
    • https://gunurineso.files.wordpress.com/2020/06/84621849734.pdf
    • https://tuponizozu.files.wordpress.com/2020/06/3196133925.pdf
    • https://bubusajofugi.files.wordpress.com/2020/07/72253157010.pdf
    • https://danadarebu.files.wordpress.com/2020/07/tadupijavawovutetuna.pdf
    • https://jexosatija.files.wordpress.com/2020/06/87762576982.pdf
    • https://kijomevoduno.files.wordpress.com/2020/06/73599224805.pdf
    • https://cdn.shopify.com/s/files/1/0432/9383/5432/files/38557107684.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/32360671381.pdf
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/fimajafaxaruf.pdf
    • https://cdn.shopify.com/s/files/1/0433/9479/3630/files/41280243730.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/22081149179.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/lujokuto.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4099/files/goxowejanarurowepo.pdf
    • https://cdn.shopify.com/s/files/1/0427/4143/2487/files/47242137509.pdf
    • https://cdn.shopify.com/s/files/1/0428/5680/8607/files/fulizexagadi.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_off00007350.bin
db32a3cb59e16dc838c631f41f8c045991f6676dfbbd378e9d0a5e10b3a84348		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7350 5336 bytes
font_01_sfnt_off00008564.bin
99622ea4531b399edecfa7253803bcf8c32e670d8cf063430f2123b693e929d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8564 9812 bytes

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