Malicious PDF — malware analysis report

Static analysis result for SHA-256 121b902c83fe6ee1…

MALICIOUS

PDF

80.1 KB Created: 2020-08-03 22:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 372eed710e6776caaaabdba4abda0140 SHA-1: 1af6857f2385204846f107f5ae87eb63b0fc8b0a SHA-256: 121b902c83fe6ee189b2458e4b509429524db180fcc43a7687f7b6be295174b8
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are hosted on domains that appear to be part of a link farm. One prominent URL, 'https://ttraff.ru/pify?keyword=flywheel+energy+storage+calculation+pdf', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same redirector URL.

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=flywheel+energy+storage+calculation+pdf
    • http://files.wedmorehh.com/uploads/1/3/1/8/131856173/wumanugepuxuxek.pdf
    • http://files.wilsonfarmmurfreesboro.com/uploads/1/3/1/4/131437924/sesujojenufivu.pdf
    • http://files.donnamoralesactress.com/uploads/1/3/0/7/130740612/konufazewebu-tilapunuruta-tamate.pdf
    • http://files.thevikinglawyer.com/uploads/1/3/0/7/130740438/tiniwikasomupedibu.pdf
    • http://files.westtenaudio.com/uploads/1/3/1/8/131871970/lomaxipowokadil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8897/7813/files/wuzufopumekujifu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/78819802283.pdf
    • https://cdn.shopify.com/s/files/1/0436/1447/0302/files/29990980650.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9831/files/18843688567.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1575/files/58244014016.pdf
    • https://cdn.shopify.com/s/files/1/0428/3446/0828/files/wiripunos.pdf
    • https://cdn.shopify.com/s/files/1/0428/7430/6727/files/12765046790.pdf
    • https://cdn.shopify.com/s/files/1/0429/6320/6307/files/zugejaritujino.pdf
    • https://cdn.shopify.com/s/files/1/0440/8197/1365/files/difivimopojibekeridifimuz.pdf
    • https://cdn.shopify.com/s/files/1/0440/8256/1176/files/kuxatud.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc77.bin
e852ac6cec3cb8ba91868a6d3d1d692b98100027fded77b059e3c245f6553352		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC77 5568 bytes
font_01_sfnt_off0000ef7d.bin
25c69dcc6b8fc1f0c8dc6355bbe63f313e24f605b8a9820ff28749f7413e9117		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7D 14448 bytes
font_02_sfnt_off00011e2b.bin
84d5bd19c210eb3b73ecc14096ab1e56fdfb5b80ce7ba4f0052c67c0c2b02727		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2B 16060 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.