Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2c724348d723d2…

MALICIOUS

PDF

46.5 KB Created: 2020-07-13 23:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24663eaddd1fcb74f1627f0df5c22be8 SHA-1: faac952102ba26655ad999ce0d3d119932bac2c3 SHA-256: 6e2c724348d723d2cf80e6cf31a52dea4d2ed918bb823143faa3f793aa8e22ff
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which are designed to appear as legitimate document downloads but ultimately redirect to the malicious domain ttraff.com. This indicates a link farm or SEO poisoning tactic to drive traffic to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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/wb?keyword=charniak%20introduction%20to%20deep%20learning%20pdf
    • http://files.chasingeverydayadventure.com/uploads/1/3/0/7/130738568/4974595.pdf
    • http://files.frankhagancontracting.com/uploads/1/3/2/6/132681404/zatamutofineve.pdf
    • http://files.viktoriaivking.com/uploads/1/3/0/8/130814630/8c315637f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://lovivofono.files.wordpress.com/2020/07/vugobuxu.pdf
    • https://julames.files.wordpress.com/2020/07/68626175875.pdf
    • https://xajilaxaluv.files.wordpress.com/2020/06/xifaruxuliredivise.pdf
    • https://tupipek.files.wordpress.com/2020/07/fudadifojov.pdf
    • https://kedewemu291756887.files.wordpress.com/2020/06/tudevejilowekiwijesakirub.pdf
    • https://zezumova.files.wordpress.com/2020/06/gejebogajinipubafa.pdf
    • https://biwudago.files.wordpress.com/2020/06/15114066709.pdf
    • https://cdn.shopify.com/s/files/1/0430/2287/6826/files/balipuzapikonalekulig.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/23392668276.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sikotifukiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/84001506291.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/texirid.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81108552740.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/fusan.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_off00007874.bin
ed33c76de3392ca9ad1f075ba84adee1bc4ef341eae8c3bb0c17afaec705b8dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7874 5208 bytes
font_01_sfnt_off00008a23.bin
30288269c0b916c88ff7cf9b0dfcf5a20ecc57c7d0d30a53148e7804a5afb718
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A23 10108 bytes