Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e42b692acedca04…

MALICIOUS

PDF

54.5 KB Created: 2020-08-29 22:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd60703e9f058b4de6e017a918b406ef SHA-1: 84edc65e44f42f6e144873e36ac8883d05ddfbae SHA-256: 7e42b692acedca04ffe44df74e0d3d24c0e070b990ac009ebf6df6b17df57caa
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=the+wave+principle'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of outbound links. The ML classifier also strongly flagged this PDF as malicious. These indicators suggest the document's primary purpose is to redirect users to malicious infrastructure.

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/wix?keyword=the+wave+principle
    • https://static.usrfiles.com/ugd/b8c837_1589c453960241e1bbf366f3a6ae3c92.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d9df525fec94099a8c97dcaba23c6f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_b023001898134fe8b6c924ffb909eb18.pdf
    • https://static.usrfiles.com/ugd/b8c837_17f1c1cc5e7d4cbe956763da8340c39f.pdf
    • https://static.usrfiles.com/ugd/b8c837_80b8a4e5090542099a0308f65006ce3b.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9f6869b972445329dbd2fbf0133938f.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ac9f9b88e3c48abafbd446574e31abb.pdf
    • https://static.usrfiles.com/ugd/b8c837_61cac3feeb7743d2911af8ce56d9667b.pdf
    • https://cdn.shopify.com/s/files/1/0432/7954/8580/files/analytical_mechanics_by_virgil_moring_faires_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/ascorbic_acid_msds.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/pefuravofanolojebu.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/wodezub.pdf
    • https://cdn.shopify.com/s/files/1/0431/2635/8173/files/1001_arabian_nights_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5901/files/91419540179.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/liwisubusamepumiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5974/8769/files/mathematics_rules.pdf
    • https://cdn.shopify.com/s/files/1/0436/3337/7440/files/dadewejegoniku.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_off0000986a.bin
2e1cbedd88a85726b05fcf0c2374687e4057888e57078f7d371c28baf4a75958		 pdf-font-stream PDF embedded font (sfnt) at offset 0x986A 4944 bytes
font_01_sfnt_off0000a94f.bin
51a5af7d083c259412fe36ff320dd475ce6d74a554e5bf01115c719ca2cbf636		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA94F 10456 bytes

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