Malicious PDF — malware analysis report

Static analysis result for SHA-256 99b371686e94841d…

MALICIOUS

PDF

47.3 KB Created: 2020-08-19 22:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3f7cd97f78a6efa32e911951bdac82f SHA-1: 2e016d5484f470b015599ef209a373cd89b5cc4a SHA-256: 99b371686e94841d09c583a6ee6f0ef446c7f4ca341b6eab64f68d998e578b0c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDF files, which is characteristic of a link farm used for SEO manipulation or to obscure malicious redirects. The primary malicious link, https://ttraff.ru/pify?keyword=wow+classic+hunter+leveling+guide+pet, is identified as a known malicious redirector. The ML classifier strongly indicates maliciousness, and the PDF structure itself is flagged for containing a malicious redirector and a link farm.

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=wow+classic+hunter+leveling+guide+pet
    • http://zazevo.momercize.com/uploads/1/3/0/7/130776167/fisolemowalojibema.pdf
    • http://nuzezunoj.linhbridal.com/uploads/1/3/0/7/130740178/wowujejivegonetet.pdf
    • http://files.shannon-nightingale.com/uploads/1/3/1/1/131163867/6038873.pdf
    • http://files.childrenspoetrybygeoffrey.com/uploads/1/3/2/6/132683137/fapefedujit-tufululaw-wenobegoj.pdf
    • http://files.bxd-ia.org/uploads/1/3/1/4/131437484/tukenujinir_kemuji_nugenobijov_lugaxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8064/6807/files/62759521575.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/pazosawiloxotafewi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6728/5410/files/62423986747.pdf
    • https://cdn.shopify.com/s/files/1/0430/9703/0817/files/xanetidiz.pdf
    • https://cdn.shopify.com/s/files/1/0438/6881/5528/files/andrea_wilson_hacker_facebook.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1062/files/avrdudess_2._2.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/63048965215.pdf
    • https://cdn.shopify.com/s/files/1/0431/4982/0065/files/vasivupukerumasemobujum.pdf
    • https://cdn.shopify.com/s/files/1/0433/1021/9422/files/majobenaluxuguzuji.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0766/files/maths_formulae_for_class_8.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/80184663372.pdf
    • https://cdn.shopify.com/s/files/1/0434/2094/2486/files/94462136729.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_off00007b64.bin
b4b39275c46fd69bb451dad3c3625859e8888640d813181602a3f3a37207a079
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B64 5500 bytes
font_01_sfnt_off00008e27.bin
4dc0691b905521c58ef9b2db501b3a6bfa6f05aa285326c0eedf0668c0093077
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E27 10056 bytes