Malicious PDF — malware analysis report

Static analysis result for SHA-256 a81bee6f934e2888…

MALICIOUS

PDF

37.0 KB Created: 2020-08-09 04:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b572e4bee6f95fdd80ab8de414e1c55 SHA-1: 048805e5046d88831791d3a5c09ae2a7c6703b8a SHA-256: a81bee6f934e2888ba99896f696bb99bd55236bdc9d9d47c738cb1366a2c364f
150 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common technique for delivering malicious payloads. The document body and heuristics indicate a lure for a 'kambi katha malayalam pdf download', which is likely a pretext to get the user to click the malicious link. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious redirector URL is a high-confidence indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.com/pify?keyword=kambi+katha+malayalam+pdf+download
    • http://jirigij.emilyflowerportfolio.com/uploads/1/3/0/9/130969465/mumovo_sujulowibome_legijukewewa_raworune.pdf
    • http://files.waddellapples.com/uploads/1/3/0/9/130969982/witavekorafigibuloxo.pdf
    • http://files.matthew-taylor.co/uploads/1/3/1/6/131637811/8b7de04992f790.pdf
    • http://files.foundationschristianschool.com/uploads/1/3/1/8/131871705/2d6923f375f09a.pdf
    • http://files.retreatatprairiewind.com/uploads/1/3/2/7/132740639/5017326.pdf
    • https://cdn.shopify.com/s/files/1/0433/9171/3443/files/quake_4_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0432/7679/6057/files/votirojozevexiweremit.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4717/files/59906454267.pdf
    • https://cdn.shopify.com/s/files/1/0433/7670/5692/files/dasewowixefik.pdf
    • https://cdn.shopify.com/s/files/1/0435/4709/9287/files/57723939913.pdf
    • https://cdn.shopify.com/s/files/1/0432/5169/5771/files/tuwopebilazunigoji.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/reset_autonomous_desk.pdf
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/bsc_nursing_2nd_year_syllabus_bfuhs.pdf
    • https://cdn.shopify.com/s/files/1/0428/8082/7558/files/64029549209.pdf
    • https://cdn.shopify.com/s/files/1/0433/4436/3678/files/buvutejutowefumarifosoxi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3349/1606/files/descriptive_writing_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/3939/9842/files/95431773492.pdf
    • https://cdn.shopify.com/s/files/1/0429/9581/0455/files/29063050952.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/2044177804.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8022/files/fiwirokisudumaditin.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_off00005201.bin
b3bf90cab1c829213f601b2f3cd6c6b7952ca895d6c9ace332a8040ee3010465
pdf-font-stream PDF embedded font (sfnt) at offset 0x5201 5372 bytes
font_01_sfnt_off0000643e.bin
ad07ef613387e7d26b2b831caddf6bd69a843ddbbc810828855afc0bc6c7aafe
pdf-font-stream PDF embedded font (sfnt) at offset 0x643E 10192 bytes