Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcdd6b1f1973a807…

MALICIOUS

PDF

50.1 KB Created: 2020-08-05 04:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a26521aeb92bbfc5d59586338a0ceae SHA-1: f02ade65af03566ac424dc1f03638dcb80a2d7e9 SHA-256: fcdd6b1f1973a807a54bcecebb6139f82fcd6fca844d6567f73a08948b96aadb
152 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to a malicious redirector at 'ttraff.cc' under the guise of a 'blockchain pdf book'. The document contains a large number of embedded URLs, many pointing to Shopify domains, which likely serve to obscure the malicious redirector and potentially improve search engine ranking for the lure. The ML classifier strongly indicated maliciousness, and the presence of a known malicious redirector confirms the intent to lead users to harmful content.

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.cc/pify?keyword=blockchain+pdf+book
    • http://files.doralcardiology.net/uploads/1/3/1/4/131453329/xikonozopefakako.pdf
    • http://files.peaceofmindbodysoul.com/uploads/1/3/1/1/131164239/16a31d.pdf
    • http://files.daytonatopagents.com/uploads/1/3/0/7/130740429/gadowotodufidotinug.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/46143793457.pdf
    • https://cdn.shopify.com/s/files/1/0434/0223/1971/files/microsoft_leap_program.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0447/files/jejiwiberif.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/93994890774.pdf
    • https://cdn.shopify.com/s/files/1/0429/5986/3961/files/zogepazajipizavitenid.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/mulopamenate.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/kelukomafe.pdf
    • https://cdn.shopify.com/s/files/1/0432/1532/3291/files/sociologia_da_educao_pierre_bourdieu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6175/5555/files/remagomidiridubibiku.pdf
    • https://cdn.shopify.com/s/files/1/0436/9504/6824/files/kosekoninomir.pdf
    • https://cdn.shopify.com/s/files/1/0441/3777/5256/files/88396969960.pdf
    • https://cdn.shopify.com/s/files/1/0440/6607/8870/files/lubipimen.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_off000079a6.bin
dd1f882b253f320ae096b389f4c9f792be3af73a61ac0ed3ff1a97ba42605496		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A6 4812 bytes
font_01_sfnt_off000089de.bin
0ac771571a694bd8afcaaad5362548de830d4f34fc6a077c1655a78ea9fc22ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89DE 10716 bytes
font_02_sfnt_off0000adb0.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADB0 4324 bytes

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