Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ea488a31cc1159…

MALICIOUS

PDF

44.4 KB Created: 2020-08-20 22:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d8e058316ac635f98c6515b981bd4b0 SHA-1: 42555f6ba6a9ccd2f4b43ea429ec814e9d2b2681 SHA-256: 61ea488a31cc11592328ffa17c9754f69ecd122d8c698582d82223b3ad1c2445
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a training course advertisement. This redirector likely leads to further malicious content or exploits. The PDF also hosts a large number of links to other PDFs on Shopify, potentially for SEO manipulation or to obscure the malicious link. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/pify?keyword=agent+d%2527+escale+formation+bordeaux
    • http://files.familylawyerminnesota.com/uploads/1/3/1/6/131607712/jubigi_vomikewupinoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/7006521621.pdf
    • https://cdn.shopify.com/s/files/1/0432/3773/6603/files/rutuzudukiruturivulogi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3769/5906/files/fill_drupal.pdf
    • https://cdn.shopify.com/s/files/1/0430/0029/9683/files/entrepreneurship_management_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9621/files/55064072869.pdf
    • https://cdn.shopify.com/s/files/1/0439/4283/8427/files/bixal.pdf
    • https://cdn.shopify.com/s/files/1/0435/4896/7061/files/47050577674.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b67.bin
07ca6c1783316e4ef3ba3b3c3324d881659204d6498c42ef9eda2234bcdbb020
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B67 5452 bytes
font_01_sfnt_off00005de7.bin
7ac174a6d1e66ad27981afdcb2ac90fa0bf16c8fcbd17f113666785e1a84cd21
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE7 10336 bytes
font_02_sfnt_off00008149.bin
fe139538347d724e6b27dab22ead91fbb1eb3470a850438049392072e7f85921
pdf-font-stream PDF embedded font (sfnt) at offset 0x8149 16208 bytes
font_03_sfnt_off0000968a.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x968A 4324 bytes