Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f80c0daeff04a21…

MALICIOUS

PDF

43.7 KB Created: 2020-08-24 05:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e85a30d77a9a367257e4f0c93f3b5274 SHA-1: 6b346c1106a43e13d99dff6b41ddf6d81113a2e1 SHA-256: 5f80c0daeff04a2186fdc6507824bd75b4503ded6cd228da4abba64a12e4c1a0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body text, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=airline+revenue+management+book+pdf', suggesting a lure to a potentially malicious site. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, likely for SEO manipulation, and 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms a link to malicious infrastructure.

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=airline+revenue+management+book+pdf
    • http://golerup.chelseaniehaus.com/uploads/1/3/0/7/130739625/penukezodegeka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/0908/0477/files/tumewimave.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwunojipodaga.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/kulibapegipoxekigewo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/tavamopujinenanowirodu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7421/5331/files/tufidefewekutusupipekobe.pdf
    • https://cdn.shopify.com/s/files/1/0433/4836/1375/files/pagafevorilevujixozewu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3907/2161/files/surapatok.pdf
    • https://cdn.shopify.com/s/files/1/0429/6212/4959/files/mopowunepajitanukovej.pdf
    • https://cdn.shopify.com/s/files/1/0438/9827/3944/files/zemokoba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lonub.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f4f.bin
fd2c4d5f7383ebb9a2b783cf31384f91fa90ac29a1b42655c129c0137e7fe8bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4F 5320 bytes
font_01_sfnt_off00007145.bin
02f777649ec0c04e812d9118c854118a881c05f86f6f174318295e6757cfb36c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7145 10232 bytes
font_02_sfnt_off00009436.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9436 4324 bytes