Malicious PDF — malware analysis report

Static analysis result for SHA-256 824d0500892019a8…

MALICIOUS

PDF

54.5 KB Created: 2020-08-04 06:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c80724bac257452218fea69fa5676009 SHA-1: 0845a92c029b88293d45390798e31e2058095f49 SHA-256: 824d0500892019a8173bab6c3ea60222c71235075b12779d106ab074430cb5d4
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is part of a link farm designed to host numerous malicious or spam-related documents. The document body text, though partially corrupted, includes keywords related to a government scheme, suggesting a social engineering lure. The ML classifier strongly indicated maliciousness, and the PDF structure itself points to a malicious redirector.

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.com/pify?keyword=pradhan+mantri+awas+yojana+application+form+pdf+in+marathi
    • http://files.atxcandlecompany.com/uploads/1/3/0/8/130813667/decf2fbada3ef.pdf
    • http://files.vestvisual.com/uploads/1/3/1/8/131871659/7767505.pdf
    • http://files.flagstaffstemcity.com/uploads/1/3/0/8/130874090/7850961.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0439/5961/5646/files/75994061371.pdf
    • https://cdn.shopify.com/s/files/1/0429/7791/9129/files/78088624984.pdf
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/8032887256.pdf
    • https://cdn.shopify.com/s/files/1/0439/1639/4648/files/85801315406.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/safalilejuvusedobema.pdf
    • https://cdn.shopify.com/s/files/1/0428/8059/8172/files/17300559810.pdf
    • https://cdn.shopify.com/s/files/1/0444/0326/1606/files/colour_blindness_test_book_with_answer.pdf
    • https://cdn.shopify.com/s/files/1/0436/2108/9444/files/37407449998.pdf
    • https://cdn.shopify.com/s/files/1/0427/8140/9436/files/vimefafirabekaberege.pdf
    • https://cdn.shopify.com/s/files/1/0430/1013/0073/files/71203868851.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006020.bin
8b524a20a960f1e3f6b0a2ffb36b0d29138a05a88bdecb101092c24a2ee64c9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6020 5336 bytes
font_01_sfnt_off0000721d.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x721D 3720 bytes
font_02_sfnt_off00007d80.bin
67d262f4194ac7a4f33ef10652f2baabedb6bd5bf93235e45f66dda45988938f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D80 10228 bytes
font_03_sfnt_off0000a08b.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA08B 4324 bytes
font_04_sfnt_off0000ae8b.bin
e1f0e71090e5829d5c51a1f2afeb87c21799ea3d3b9fcae04f779d99ea85cf3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE8B 8788 bytes

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