Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b8188a04dcae9b7…

MALICIOUS

PDF

45.1 KB Created: 2020-08-18 16:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dd61021685fcc5a97f3b0699a5b9942 SHA-1: 85eb650727fb4f39c4b1cb7a396e57db6cb88cf4 SHA-256: 9b8188a04dcae9b73048108dffcfb23584863d463ca54c6ff5bb3708fbbc0dfe
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged as malicious by multiple heuristics, including a critical finding for a redirector link to ttraff.ru and a link farm containing numerous embedded URLs. The ML classifier also assigned a high probability of maliciousness. The document body contains obfuscated text and references to the redirector URL, suggesting it is designed to lure users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=borderlands+2+gibbed+save+editor+weapon+guide
    • http://files.isaiahinstitute.org/uploads/1/3/1/6/131637218/wakirijogavafemo.pdf
    • http://weposomu.mjfk.dk/uploads/1/3/0/7/130775257/rogifepavedizat.pdf
    • http://files.abundantlifechewelah.com/uploads/1/3/1/4/131438260/c693c7d19.pdf
    • http://files.dobiedomain.com/uploads/1/3/0/9/130969655/48b94d8bd9.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kaxepetumikikexozifaxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3629/5836/files/ubuntu_server_64_bit_for_virtualbox.pdf
    • https://cdn.shopify.com/s/files/1/0430/9037/8909/files/bopitobifo.pdf
    • https://cdn.shopify.com/s/files/1/0450/3588/0598/files/lanurefif.pdf
    • https://cdn.shopify.com/s/files/1/0434/6642/4477/files/90421004378.pdf
    • https://cdn.shopify.com/s/files/1/0428/7663/3247/files/timeline_worksheet_year_6.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sovaratumu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0294/3909/files/arriscando_a_prpria_pele_assimetrias_ocultas_no_cotidiano_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/fuwudaxutopujazemawox.pdf
    • https://cdn.shopify.com/s/files/1/0447/4237/7623/files/rizezavexanola.pdf
    • https://cdn.shopify.com/s/files/1/0437/7382/1082/files/kekelig.pdf
    • https://cdn.shopify.com/s/files/1/0434/8834/6262/files/35190049360.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/87460354479.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063f1.bin
b8d9022f5dda0796a36cc3143e64322fecf9de8f88364123f6258b3a521b4e65
pdf-font-stream PDF embedded font (sfnt) at offset 0x63F1 5484 bytes
font_01_sfnt_off000076b6.bin
d0bec7df4b741f058a115962b910a701c030a522335ce9240d1b1bd27315ca52
pdf-font-stream PDF embedded font (sfnt) at offset 0x76B6 10056 bytes
font_02_sfnt_off000098ee.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x98EE 4324 bytes