Malicious PDF — malware analysis report

Static analysis result for SHA-256 58dff105e66782a7…

MALICIOUS

PDF

104.9 KB Created: 2020-07-31 10:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d597e0ea1354f91891bf21b7053006bc SHA-1: c8fe8958504892e6d519393c120f798640386764 SHA-256: 58dff105e66782a70ce33d6ffb5423d3c7d58c13415889d020a5242bad4108f1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector infrastructure at 'ttraff.ru'. It also functions as a link farm, directing users to numerous other PDFs hosted on Shopify. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document title and redirection to malicious 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=communism+vs+capitalism+cold+war+pdf
    • http://files.kgsportsfoundation.org/uploads/1/3/0/7/130739294/153450.pdf
    • http://files.barnfeet.com/uploads/1/3/1/4/131437037/gurafamopegujulikot.pdf
    • http://files.yellowpointfarms.com/uploads/1/3/1/4/131483027/fffa0eb2cdafd5c.pdf
    • http://files.northbridgeag.com/uploads/1/3/0/9/130969097/d8564b5894da.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/fevuxaxoribovaxukisikabel.pdf
    • https://cdn.shopify.com/s/files/1/0440/8888/5413/files/pedezufexekonudukivetobos.pdf
    • https://cdn.shopify.com/s/files/1/0428/5467/8687/files/53299506531.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/81107398334.pdf
    • https://cdn.shopify.com/s/files/1/0428/6627/8556/files/jakuji.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/83161398720.pdf
    • https://cdn.shopify.com/s/files/1/0428/7548/6367/files/libavinixorinipukowikof.pdf
    • https://cdn.shopify.com/s/files/1/0438/6163/9318/files/vamomuzesukabe.pdf
    • https://cdn.shopify.com/s/files/1/0432/3871/9648/files/51821696072.pdf
    • https://cdn.shopify.com/s/files/1/0431/5961/7690/files/81471222084.pdf
    • https://cdn.shopify.com/s/files/1/0435/1016/9759/files/36673204417.pdf
    • https://cdn.shopify.com/s/files/1/0435/3556/4959/files/fiwetiziv.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2520/files/72367082305.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015ef1.bin
45f22c61a6469a8846b5fe2cc0b999f645c585267c6b041f4ad2fe720f714926
pdf-font-stream PDF embedded font (sfnt) at offset 0x15EF1 5240 bytes
font_01_sfnt_off000170b6.bin
b817bb2657e5dfda11360aaca2148536d7a2a0b152ee0b4926263c750d140bae
pdf-font-stream PDF embedded font (sfnt) at offset 0x170B6 10748 bytes