Malicious PDF — malware analysis report

Static analysis result for SHA-256 c33d3d26029a94fe…

MALICIOUS

PDF

42.4 KB Created: 2020-08-04 00:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1bc0409b329bcd5054d7d78b152f792 SHA-1: 8d3c2ded86a1ca1d9243db907b98766238c9635a SHA-256: c33d3d26029a94fe32229cc1126b8ad924e3f25fa59f54877b8e8cb546759d57
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a document about peptic ulcer types. This indicates a phishing or scam attempt. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation or to obscure the malicious redirector. No scripts were extracted, but the presence of a malicious redirector and the document's deceptive content strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=peptic+ulcer+types+pdf
    • http://files.brunswicknaturesculpturewalk.com/uploads/1/3/1/4/131437044/789783.pdf
    • http://files.sirkil.com/uploads/1/3/1/4/131455621/8463579.pdf
    • http://files.firstathens.org/uploads/1/3/2/7/132710687/9347935.pdf
    • http://files.cassandrasuareznutrition.com/uploads/1/3/0/9/130969966/3779717.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/12170470124.pdf
    • https://cdn.shopify.com/s/files/1/0434/7192/9496/files/dupodiwobeguwesekipu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/42538674739.pdf
    • https://cdn.shopify.com/s/files/1/0430/1350/5185/files/noferobepijebofeduluzi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0961/3725/files/fuwubunutelivol.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/55064594193.pdf
    • https://cdn.shopify.com/s/files/1/0431/6777/6919/files/beowulf_a_new_verse_translation_bilingual_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/5875/5749/files/tibiluxinipoliru.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/free_academic_journals.pdf
    • https://cdn.shopify.com/s/files/1/0434/4188/1254/files/nuxurepepomijafil.pdf
    • https://cdn.shopify.com/s/files/1/0431/7983/5547/files/tiruxataguzufogomevera.pdf
    • https://cdn.shopify.com/s/files/1/0431/0374/8260/files/fundamentals_of_agronomy_notes.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/xixodumiwulajinivinurosi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4948/3426/files/muzikotulinoxilafumap.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_off0000686c.bin
d13be299f0d402d16958189832bf4c01e81caf6f71e1188e6182dc13b8aa222d
pdf-font-stream PDF embedded font (sfnt) at offset 0x686C 5044 bytes
font_01_sfnt_off000079ac.bin
08c194554b85137f63229a1d287b80e4b5613b6d1fff07420e9a9054ba71b8ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x79AC 10464 bytes