Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c5f0c26c0244286…

MALICIOUS

PDF

37.2 KB Created: 2020-09-09 15:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d0cb06dde13f2c77917fdd9ff1d666f SHA-1: 7209ca22666131b365a3bc6dad8eccf66ab70f56 SHA-256: 5c5f0c26c02442860639e40d6f9e2524504e807f6fdca822284e9665e85d8f37
154 Risk Score

Malware Insights

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

This PDF file contains a link to a redirector URL, which is flagged as malicious. The document body, though heavily obfuscated, appears to contain the same malicious URL and a list of other URLs, likely intended to mimic search results or a link farm. The presence of numerous embedded URLs, including the malicious redirector, suggests an attempt to drive traffic to malicious infrastructure, potentially for phishing or malware distribution.

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.me/wix?keyword=nursing+uniform+shoes+near+me
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/91326406793.pdf
    • https://cdn.shopify.com/s/files/1/0433/2489/9496/files/biological_classification_objective_questions.pdf
    • https://cdn.shopify.com/s/files/1/0440/6083/6005/files/relevance_of_adolescent_psychology.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6845/files/activemelody_jam_tracks.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/44637903302.pdf
    • https://static.usrfiles.com/ugd/ab63e3_bcc0916a493047e896d1ad3f83391151.pdf
    • https://static.usrfiles.com/ugd/5a4aad_02ce7da97af24bfd80078b31ba57ca08.pdf
    • https://static.usrfiles.com/ugd/cfbfd2_d6f319de1b0e473a94915484c0ed950b.pdf
    • https://static.usrfiles.com/ugd/27135d_0c2c350414ea4f4e86e801292aa0e360.pdf
    • https://static.usrfiles.com/ugd/06497e_03259ebdff904723b6618d3928b92832.pdf
    • https://static.usrfiles.com/ugd/974a4e_acda17dda8554b34912a16949fbadd11.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_off000046cc.bin
5e3e1bb2d0968b881da2e2fe2ceefacd41b33f3a94c3e66ad444570b2bd374f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x46CC 4920 bytes
font_01_sfnt_off00005754.bin
7ca763067600b9765a9b3b1f1c872cabfa7659f57c3dfb49f54bac495eeffb2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5754 10240 bytes
font_02_sfnt_off00007a53.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A53 4324 bytes