Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ca0dcd4e572aaf6…

MALICIOUS

PDF

40.1 KB Created: 2020-09-06 10:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c754f480f9050b3f538fe21ace3b0531 SHA-1: f6ace3cef71b293d13c32371871cd3bc92c17b70 SHA-256: 4ca0dcd4e572aaf6007a31f4f6ffa2891e74e3dfecb1d547264313e184fdfcb9
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.link, which is disguised as an exam guide. This suggests a phishing attempt to redirect users to malicious content. The PDF also contains a large number of links to other PDFs hosted on Shopify, likely for SEO manipulation to improve the ranking of the malicious link. No scripts were extracted from this sample.

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.link/wix?keyword=vidyasagar+jawahar+navodaya+vidyalaya+pravesh+pariksha+guide
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/rugezawuwowajinag.pdf
    • https://cdn.shopify.com/s/files/1/0430/9529/4109/files/new_bodo_dj_song_2019.pdf
    • https://cdn.shopify.com/s/files/1/0464/7996/6360/files/audi_q5_2018_manual_uk.pdf
    • https://cdn.shopify.com/s/files/1/0433/1021/9432/files/fybcom_business_communication_notes_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0465/0831/0678/files/jofapeleburivudisav.pdf
    • https://static.usrfiles.com/ugd/b80405_2e52d40159274a4492b267722e628338.pdf
    • https://cdn.shopify.com/s/files/1/0432/3590/1602/files/mojivetagobubuwepeluv.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/wusowobexaxomuju.pdf
    • https://cdn.shopify.com/s/files/1/0441/1087/2728/files/defensa_siciliana_najdorf.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5502/files/16736175209.pdf
    • https://cdn.shopify.com/s/files/1/0437/4183/9514/files/logic_young_jesus.pdf
    • https://static.usrfiles.com/ugd/b8c837_e51eb82ffb154d6ea71517379899237c.pdf
    • https://static.usrfiles.com/ugd/90d19e_147b98742b8d42c9bbd24e770022ffa7.pdf
    • https://static.usrfiles.com/ugd/db1da1_6d6f110ed455438fa66918f6d2c65d53.pdf
    • https://static.usrfiles.com/ugd/b8c837_3851de46bcda44aaa09f9777e3047ad9.pdf
    • https://static.usrfiles.com/ugd/76de1a_82867c0c5a05450eb69386c23c429e86.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_off00004895.bin
b355150cf80109c8e3259869abcf6cbc2aaf9521ff7a87c83b3cba9e1cae9c4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4895 5580 bytes
font_01_sfnt_off00005baa.bin
b6d5722ddabe08fa81a7b2f7b4b041478cf60c049fa5c9a16196004a3f81a2a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAA 9916 bytes
font_02_sfnt_off00007dab.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAB 16164 bytes

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