Malicious PDF — malware analysis report

Static analysis result for SHA-256 3159e3d2eb30d6fb…

MALICIOUS

PDF

45.7 KB Created: 2020-08-06 07:38:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da96043f75a67d35223bec4b032ec3d3 SHA-1: 1ab453d966703a2bad6c2f3200dde09b11c0ab16 SHA-256: 3159e3d2eb30d6fbbcbaa4d128dbd5bbf49b2f92a996b624dbdd5aaa05308248
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The document body and embedded links suggest a tactic to lure users with seemingly relevant content while redirecting them to potentially harmful sites. The ML classifier strongly indicated maliciousness, supporting the presence of a malicious redirector and a link farm.

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=tnpsc+monthly+current+affairs+in+english+pdf
    • http://files.garlicfeast.com/uploads/1/3/2/7/132740329/35da8ca2c.pdf
    • http://files.mensanapsychology.com/uploads/1/3/0/7/130739719/vugujikejuk.pdf
    • http://fibawa.ps165qcomputerlab.com/uploads/1/3/0/8/130874474/zoveri.pdf
    • http://sumoz.ltltriad.com/uploads/1/3/0/7/130739024/2097330.pdf
    • http://files.onlineschoolforyourspirit.com/uploads/1/3/1/8/131872286/vetatazolew.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/cardiovascular_system_anatomy_notes.pdf
    • https://cdn.shopify.com/s/files/1/0437/1628/0469/files/11423119407.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/zexufafubi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4665/files/pamizigaguxigo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/kasusamatewilo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0021/files/30914167251.pdf
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/rawof.pdf
    • https://cdn.shopify.com/s/files/1/0431/6135/4389/files/32716139715.pdf
    • https://cdn.shopify.com/s/files/1/0432/4874/6651/files/past_tense_vs_present_perfect_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/bujugujebumajedasoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pekazojifedabefotekufof.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ea5.bin
08da7d1d34d42a1da47d3f21bda187936430462fcc7fd76454d71c78a2d0d586		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA5 5620 bytes
font_01_sfnt_off0000719f.bin
083bc24c4bc17f3ab025753fa7e569378d0efc770eb36ad3d55e3db3cc3d5b77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x719F 5392 bytes
font_02_sfnt_off00008419.bin
0fee611d10543820e6a6c419fd1db20d7a276cb56a7690b9936231231e595b39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8419 11448 bytes

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