Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa269b06282f1c1…

MALICIOUS

PDF

43.7 KB Created: 2020-08-14 16:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63a79ff3ce762f80c43a091ba27b5607 SHA-1: cb9c9901754867d5b807b3a6fb58e9543851e1f1 SHA-256: 5aa269b06282f1c17d7773282d3a0729f18f627324c39fd7ef90dc077b7d171a
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=deer+hunting+ontario+guided'. The document also exhibits characteristics of a PDF link farm, hosting numerous external links, many of which are hosted on Shopify but some are on unknown domains. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent, possibly for SEO manipulation or to redirect users to phishing or malware sites.

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=deer+hunting+ontario+guided
    • http://nibofeni.solitlife.net/uploads/1/3/1/3/131379803/2172033.pdf
    • http://sisale.twamemorybook.com/uploads/1/3/0/8/130814328/josebenapoxot_nefepanisaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3607/3366/files/94794956895.pdf
    • https://cdn.shopify.com/s/files/1/0432/9170/5500/files/xexusetujafomijovi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27055139941.pdf
    • https://cdn.shopify.com/s/files/1/0431/1669/1612/files/62211715570.pdf
    • https://cdn.shopify.com/s/files/1/0436/4170/0505/files/tere_chudiyan_ke_kangan_se_song.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7070/files/lemovaja.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8190/files/89104466957.pdf
    • https://cdn.shopify.com/s/files/1/0437/1474/0375/files/mathematical_optimization_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/2270/4030/files/70383795553.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/ludadijuzipimam.pdf
    • https://cdn.shopify.com/s/files/1/0429/4321/7830/files/vorutelujibi.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/76977121056.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_off00006dbc.bin
cc7a0153c656e40af7e435be4b34a12a67b03c6fd4772b919f4918aa2c66388b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBC 4876 bytes
font_01_sfnt_off00007e49.bin
58f3ab18ae0c6bf8f2480434e36c500c212bdeb213473526dbba4f1a882ceb8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E49 10444 bytes