Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f7ec9603783fc53…

MALICIOUS

PDF

64.1 KB Created: 2020-08-31 15:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10286db43452bb7bde5e1ebacdbb30cf SHA-1: 0047be22d8fb4eb48f0c54b69188447a0501e2bb SHA-256: 6f7ec9603783fc53cb4363b757820ee4228444634c7d7d33c2c8f4621726eb9b
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains a URL that appears to be the same as the malicious link. This suggests the document's primary purpose is to redirect users to a malicious site, likely for phishing or to download further malware.

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=bessa+r3m+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/bf650e_a7ac7b6dd25d40da98bc906a92f3e0f6.pdf
    • https://static.usrfiles.com/ugd/12dc78_756bdff8331242d0aaf531cc45fc8138.pdf
    • https://static.usrfiles.com/ugd/21e6f2_5089c937fdc64395ab006c487a75903d.pdf
    • https://static.usrfiles.com/ugd/35e1ce_6b8e333b565d412dacb6945e2ffb3ee0.pdf
    • https://static.usrfiles.com/ugd/b4a829_485a115da1e940089d3873acc04d3225.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/8473600249.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/71219732472.pdf
    • https://cdn.shopify.com/s/files/1/0451/7563/6119/files/conversion_practice_worksheet_5th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6672/files/money_banking_and_public_finance_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6746/files/miweke.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5085/files/81641164160.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/test_1879eb6a-339e-4d45-a409-571cd94a4742.pdf?v=1594212285
    • https://static.usrfiles.com/ugd/cac9e4_e531bbade619420082b148ba0dc91e38.pdf
    • https://static.usrfiles.com/ugd/e42ee3_658d924a4100425e8efbe457d69f2864.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4da.bin
7b7e04ccae5e845c6a39fe3baa8dd951085db4626c0ba6cbda0dbf66b52b1c78
pdf-font-stream PDF embedded font (sfnt) at offset 0xB4DA 5044 bytes
font_01_sfnt_off0000c5e6.bin
1bf7f19daad2e79d6d5f73b9cbb3b3a80021a2f562395401532751a8fb085963
pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E6 14320 bytes