Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d2e697cd149cbc…

MALICIOUS

PDF

47.1 KB Created: 2020-08-31 01:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a0a80d7e910b1b8676cee3ce02f603e SHA-1: 9c755442200b7aebb4595a08189db906c4ee8a31 SHA-256: 94d2e697cd149cbcda2ac8ae55235cc380bfc18a86abb09b93987d46a05079f5
152 Risk Score

Malware Insights

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

The PDF contains a mass link farm, with many links pointing to Shopify domains and one critical link redirecting to a known malicious domain, ttraff.me. The document body text, though garbled, contains the phrase 'Bambi 2 pelicula completa en espa?' and the malicious URL, suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

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.me/wix?keyword=bambi+2+pelicula+completa+en+espa%253F
    • https://cdn.shopify.com/s/files/1/0434/0252/6887/files/aviation_security_mcqs.pdf
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/korevujox.pdf
    • https://cdn.shopify.com/s/files/1/0431/6010/9210/files/the_i_ching.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/rojivif.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6231/files/19165304079.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/kadozid.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3774/files/fuginatoje.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/winnie_the_pooh_full_book.pdf
    • https://static.usrfiles.com/ugd/3649d2_6451e11cb5b34ffca3b96deddd91e42f.pdf
    • https://static.usrfiles.com/ugd/764aaa_1fdc3697427e4e39990c11be05ed41ee.pdf
    • https://static.usrfiles.com/ugd/fd30ac_55e3c4aefc4d4ef3924a92bc761f12ce.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/povusopurivozemufuxaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/0760/5923/files/snap_on_mm250sl.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_off0000760d.bin
29d8123c2097ab23d4f6a7a615db09c47777c50322487b0ce23ba24d369eee9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x760D 5444 bytes
font_01_sfnt_off0000887c.bin
050b20bc74e947d1e08c36a3b0ba4191dfb5091fd5025a3a57aff34f3e28bae9
pdf-font-stream PDF embedded font (sfnt) at offset 0x887C 11420 bytes