Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a913cd1025a5ab1…

MALICIOUS

PDF

49.6 KB Created: 2020-08-15 18:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c98ce272f25351691c69ca5a1714be56 SHA-1: bd64fc23a06ea434b1d7209b249293f389c5150a SHA-256: 3a913cd1025a5ab1d2dc3bba25275b523ded193f00a4ba8772e8e02197e5b394
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits characteristics of a link farm, embedding a large number of external links. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which likely serves to obscure the ultimate malicious destination. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated, preventing a more detailed analysis of the lure.

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/wb?keyword=general%20characteristics%20of%20microorganisms%20pdf
    • http://files.bluetarotshop.com/uploads/1/3/0/7/130739549/9768677.pdf
    • http://files.floralunaapothecary.com/uploads/1/3/0/7/130738951/4645279.pdf
    • http://tenenaz.iananc.org/uploads/1/3/1/8/131858540/6458264.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0209/files/cancionero_de_baladas_para_guitarra.pdf
    • https://cdn.shopify.com/s/files/1/0431/8871/5682/files/13527973805.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/strength_and_conditioning_books.pdf
    • https://cdn.shopify.com/s/files/1/0428/8810/2051/files/rock_paper_scissors_lizard_spock_python.pdf
    • https://cdn.shopify.com/s/files/1/0440/3757/0710/files/33832129509.pdf
    • https://cdn.shopify.com/s/files/1/0437/8319/2727/files/9123458055.pdf
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/mahendra_banking_awareness_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/pudumogukekotifokolu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4298/7423/files/80553375124.pdf
    • https://cdn.shopify.com/s/files/1/0436/0096/9896/files/nujivawodurovadaroderelav.pdf
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/modiwutimedalazijifepi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2651/3048/files/romobozewalegax.pdf
    • https://cdn.shopify.com/s/files/1/0427/5660/4070/files/brunson_poker.pdf
    • https://cdn.shopify.com/s/files/1/0428/9092/0099/files/13541091517.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_off000077ea.bin
87502b9b979696972424d71d61ba727170e9dcf999932b891f9ff8958abb72fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77EA 5388 bytes
font_01_sfnt_off00008a0a.bin
32449add90d30de9e64e25bd13696f01da0cdec0707563cec5926b765bad680c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0A 9648 bytes
font_02_sfnt_off0000ab14.bin
8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB14 4324 bytes

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