Malicious PDF — malware analysis report

Static analysis result for SHA-256 084b140d1eda596b…

MALICIOUS

PDF

43.2 KB Created: 2020-08-17 15:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 977cf567c2527e16e2e315c39e668357 SHA-1: c2c70f685f80d53f0e57b75192f74228c2e32815 SHA-256: 084b140d1eda596be46bbc68a25a2cdf5da87a08bf51fb1c93ef2abac6446a70
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, characteristic of a link farm, designed to direct users to external resources. One of these links, 'https://ttraff.ru/pify?keyword=uniformes+mais+bonitos+copa+2018', is identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness, supporting the assessment of a malicious redirector attack pattern. No scripts were extracted, but the primary attack vector appears to be social engineering through link manipulation.

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=uniformes+mais+bonitos+copa+2018
    • http://files.blwcenter.org/uploads/1/3/0/7/130740323/8794972.pdf
    • http://tenijebu.flaniganssportsworld.com/uploads/1/3/1/0/131069839/2410791.pdf
    • http://files.fringeboutiqueto.com/uploads/1/3/1/6/131607810/670534.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0544/3237/files/renunciation_of_executor_form_north_carolina.pdf
    • https://cdn.shopify.com/s/files/1/0439/0515/5227/files/nex_informatique_chalon_sur_saone.pdf
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/xibitibelibigima.pdf
    • https://cdn.shopify.com/s/files/1/0433/8194/8567/files/caregiver_burnout_scale.pdf
    • https://cdn.shopify.com/s/files/1/0438/6488/3355/files/applications_and_uses_of_computer.pdf
    • https://cdn.shopify.com/s/files/1/0436/8069/4437/files/xijerolevevekuvozurimez.pdf
    • https://cdn.shopify.com/s/files/1/0429/5580/0739/files/great_american_hero_cast.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/koxumugude.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065a4.bin
0dffc17a3fb477246ee51493a03ceb6c75c213e990eeea0452699fae1b749b9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x65A4 5780 bytes
font_01_sfnt_off0000793f.bin
56dd22813b1f44792c63debe354354ea1fda3ef2d1e3ff3626dfdd2d9a4a6e4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x793F 12412 bytes