Malicious PDF — malware analysis report

Static analysis result for SHA-256 79802a7f513d6c61…

MALICIOUS

PDF

113.5 KB Created: 2020-08-11 01:31:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1469426339bf197392cec377f834eae2 SHA-1: 4fb23e3f7d0db490425db0b1cf1dfe59dc178888 SHA-256: 79802a7f513d6c61e033d243c211080ae40cf02d2b01321375e1b320e99b2ee9
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to host or distribute further malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination.

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=enteric+bacteria+pdf
    • http://kubuzegi.inzonecoaching.com/uploads/1/3/1/6/131606490/jepeburopevaraxisesa.pdf
    • http://tilabiser.abluedotkitchen.com/uploads/1/3/1/4/131452903/sipik.pdf
    • http://files.jflesher.net/uploads/1/3/0/8/130874610/pavizezus-moduge-bopetolalub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0523/8692/files/4_khalifas_of_islam.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7409/files/befekunimejedixam.pdf
    • https://cdn.shopify.com/s/files/1/0430/9896/4117/files/40553532515.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9512/files/lafanegitososetowovuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/9997/9930/files/76900042858.pdf
    • https://cdn.shopify.com/s/files/1/0431/4877/1488/files/liwexadewub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lozafawofife.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0072/files/46398895114.pdf
    • https://cdn.shopify.com/s/files/1/0434/6635/8934/files/pioneer_vsx_522_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2409/7191/files/pibunedatazowugi.pdf
    • https://cdn.shopify.com/s/files/1/0447/6433/2181/files/transport_phenomena_bird_1st_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/6325/4944/files/60992951258.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_off00017755.bin
e5ff464dd6ac3bafd54e91a144f2f34cb15cb0914167f8c9fd9c46eec7e6c2bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x17755 5036 bytes
font_01_sfnt_off0001887b.bin
5c9fa90c7712c3168e9d9ec16f70f7323e7376ec29b61fbb737d4711877f62c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1887B 15616 bytes