Malicious PDF — malware analysis report

Static analysis result for SHA-256 12372aec5a96a46a…

MALICIOUS

PDF

34.8 KB Created: 2020-08-14 08:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8dc0197574c93da6ae81c932aa6d5992 SHA-1: a580036922fef620e064828308c76ae4d639c860 SHA-256: 12372aec5a96a46a35b87a2c09b5265e7a626a8ec525066b269e71601c3675a2
154 Risk Score

Malware Insights

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

The PDF contains a lure related to "Bonk. io hacks" and embeds numerous links, including a critical redirector to https://ttraff.ru/pify?keyword=bonk.+io+hacks. This indicates an attempt to direct users to malicious infrastructure, likely for further exploitation or phishing. The ML classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=bonk.+io+hacks
    • http://files.allsaintscresson.org/uploads/1/3/2/7/132741241/215ab08fb9e6c.pdf
    • http://files.biblestudylife.com/uploads/1/3/0/9/130969790/3111149.pdf
    • http://vivej.stelizabethrap.com/uploads/1/3/0/7/130775639/cfecf12fe7d01a.pdf
    • http://files.got-hope.org/uploads/1/3/1/3/131384171/wuxebuv-matavuno-buxaz-jinixam.pdf
    • http://files.chlaudit.com/uploads/1/3/1/4/131437474/lugodelax-rawolobusore-rusinonolemumev-vonaforu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/radademiwatapaxalupe.pdf
    • https://cdn.shopify.com/s/files/1/0437/8096/4509/files/arizona_ccw_permit_application.pdf
    • https://cdn.shopify.com/s/files/1/0448/3081/8461/files/williams_hematology_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/0475/5096/files/vomurusem.pdf
    • https://cdn.shopify.com/s/files/1/0430/0279/0039/files/zokukotobavu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0576/2974/files/revolamewedu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/56405041525.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/a_level_biology_past_papers_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/zemifabowalolugedi.pdf
    • https://cdn.shopify.com/s/files/1/0450/4512/1182/files/bowditch_traverse_adjustment.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_off00004c17.bin
200d50c23eff2db3509723d8ef53575da6eb7960b4b9a7d380e891f0194ddedb
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C17 4904 bytes
font_01_sfnt_off00005cc0.bin
bd3536cc3ff7a8f724b21e2a12f741bd26ebe5a55979299b3e85990e1e921f06
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC0 9976 bytes