Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fcdb954bf3b926d…

MALICIOUS

PDF

44.6 KB Created: 2020-09-09 21:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b2022ae68f336fd253c733343f04c3b SHA-1: 01af74e40c6e1e36b3a888c65b17140090f6b4ea SHA-256: 6fcdb954bf3b926da88aa999c4f380e83294d3595a3d846eaa859f5e1ebe12c8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm designed to distribute malicious content. One prominent link directs to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains a URL that matches the malicious redirector.

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.club/pify?keyword=2013+bmw+x1+xdrive28i+owners+manual
    • http://nojivexul.yummycrabrestaurant.com/uploads/1/3/1/4/131438079/9931096.pdf
    • http://sarum.chasehillschool.com/uploads/1/3/1/4/131453574/bapigijumewofetedi.pdf
    • http://pozigo.flywithlevi.com/uploads/1/3/0/8/130813528/575927.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/6052/7265/files/strike_force_heroes_hacked_unblocked_at_school.pdf
    • https://cdn.shopify.com/s/files/1/0433/8437/3409/files/building_technology_5.pdf
    • https://cdn.shopify.com/s/files/1/0432/6319/7347/files/tosawilemaxolonoledidivu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5529/2322/files/acute_exacerbation_of_copd_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0436/1843/5229/files/vugaliritozat.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_e5a4e74503354a0f96ab5cf34fdc048e.pdf
    • https://static.usrfiles.com/ugd/b8c837_df862a985ff243a591942ac85a3a11a0.pdf
    • https://static.usrfiles.com/ugd/affaa6_141f1c1507a942a3aabd401c416995bb.pdf
    • https://cdn.shopify.com/s/files/1/0433/9957/7756/files/doposiwupilosularenolix.pdf
    • https://cdn.shopify.com/s/files/1/0459/1462/0053/files/lomatinawenen.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3627/files/73481062630.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1687/files/kaduroredud.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a79.bin
fc1be73ad89a95cd2569bdcf9a08e26a5ad8b370476e3d711b81c747cdd6166c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A79 5724 bytes
font_01_sfnt_off00006dde.bin
ee02e9ecc855eade8275962fad3f7dc2219e3790f7b4757345bc3a12f20c479a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDE 12952 bytes
font_02_sfnt_off00009773.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9773 4324 bytes

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