Malicious PDF — malware analysis report

Static analysis result for SHA-256 0acf3a2977f8c09a…

MALICIOUS

PDF

40.6 KB Created: 2020-08-06 03:09:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0778e402f927d60a427bd2dca7777cbf SHA-1: 70de8fb191effd1a4e407b12f73e8c275155d0eb SHA-256: 0acf3a2977f8c09a77525b645925a2c3db4aa6d01dea531dfb11147d805edd83
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it redirects to malicious infrastructure via the URL https://ttraff.com/pify?keyword=characteristics+of+a+christian+leader+pdf. It also features a link farm heuristic with numerous embedded links, many pointing to Shopify domains, but one of which is the primary malicious redirector. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

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=characteristics+of+a+christian+leader+pdf
    • http://gapijowud.stfxgrads.com/uploads/1/3/0/8/130814297/jarivadid.pdf
    • http://files.andrewatkins.org/uploads/1/3/1/4/131453725/b1759bc80.pdf
    • http://files.turnerhousemedia.com/uploads/1/3/0/8/130874678/2361519.pdf
    • http://files.neurodiversityconsulting.org/uploads/1/3/1/4/131454219/wujekonixuru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4796/0232/files/easy_story_to_learn_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/tujotevosizefidij.pdf
    • https://cdn.shopify.com/s/files/1/0428/3564/0487/files/17830348222.pdf
    • https://cdn.shopify.com/s/files/1/0432/7030/7995/files/vizipatigawi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6473/7433/files/webofanunabewelanij.pdf
    • https://cdn.shopify.com/s/files/1/0429/8237/5577/files/wakorodinada.pdf
    • https://cdn.shopify.com/s/files/1/0432/4016/1435/files/bajusuribonejerijowe.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/99863957298.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/84754051152.pdf
    • https://cdn.shopify.com/s/files/1/0430/9303/3111/files/71155489975.pdf
    • https://cdn.shopify.com/s/files/1/0431/5863/4658/files/govepamakupoxerexugavujo.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_off000061fe.bin
490775d7a0bc793dd9fdf5ada5a096bafba50b92314f1d487a9d4d66c87b8818
pdf-font-stream PDF embedded font (sfnt) at offset 0x61FE 5148 bytes
font_01_sfnt_off00007375.bin
1a648438967ca9c26707d6e09e37a5306c9d8d52840db7d8f4a174d6b2567a39
pdf-font-stream PDF embedded font (sfnt) at offset 0x7375 10024 bytes