Malicious PDF — malware analysis report

Static analysis result for SHA-256 2336ccc810a99a1f…

MALICIOUS

PDF

38.5 KB Created: 2020-08-21 19:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28dac9803da02266d36ff06cc3dc2298 SHA-1: b457c09218a509eaaf7220a524cdd051eab04fcc SHA-256: 2336ccc810a99a1f9e3e90fea10a7693f76cb7d34d07c1a9c4b86973efa842d9
154 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, embedding numerous external links under the guise of a 'cable selection guide'. One of these links, 'https://ttraff.ru/pify?keyword=lutze+usa+cable+selection+guide', is identified as a malicious redirector. The ML classifier strongly supports the malicious nature of this PDF. The document's structure and embedded links suggest an attempt to lure users to malicious sites, likely for further exploitation or credential harvesting.

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=lutze+usa+cable+selection+guide
    • http://fusol.endodiabetes.com/uploads/1/3/2/8/132814742/gejedalukesi-togopogasejesoj.pdf
    • http://files.miwellnesscbd.com/uploads/1/3/1/4/131438142/0a3f69ed610e0df.pdf
    • http://files.nunobrum.com/uploads/1/3/2/3/132302992/ligoxupanux_mipebezebatiz_zefitoxafulak.pdf
    • https://cdn.shopify.com/s/files/1/0428/8787/2671/files/castlevania_symphony_of_the_night_rom.pdf
    • https://cdn.shopify.com/s/files/1/0443/5417/5132/files/entrepreneur_magazine_june_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/8797/0975/files/notorious_2009_cast.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/ripatulevurovabor.pdf
    • https://cdn.shopify.com/s/files/1/0428/8456/3110/files/48766081901.pdf
    • https://cdn.shopify.com/s/files/1/0433/7991/6967/files/58997469694.pdf
    • https://cdn.shopify.com/s/files/1/0431/2819/3184/files/chief_technology_officer_roles_and_performance.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9868/files/desomalaninovukoda.pdf
    • https://cdn.shopify.com/s/files/1/0438/2231/7728/files/41071511054.pdf
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/40011649283.pdf
    • https://cdn.shopify.com/s/files/1/0429/5278/6074/files/1248002406.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_off00005585.bin
cb33f1aca907e84e542f5335e2cba705a9107ad78d0b1bd01e988b4469d31c57
pdf-font-stream PDF embedded font (sfnt) at offset 0x5585 5144 bytes
font_01_sfnt_off0000670e.bin
a14a803c4b37110a13cc0b90b4d8f12f9b3a74e7a5571451ac57ce1e6b7a5ab4
pdf-font-stream PDF embedded font (sfnt) at offset 0x670E 11540 bytes