Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0a0f0d15797093…

MALICIOUS

PDF

71.3 KB Created: 2020-08-30 01:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e933206a1edaaf82e4e23ae8744721b9 SHA-1: b48fb34ebf856ef33bf71598b729661fb6ab1ac6 SHA-256: fc0a0f0d15797093423f7ccff539108d3e57f04d989fdfe96e2e525ad9148e37
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of a large number of external links, many pointing to benign-looking PDFs, suggests a link farm or SEO poisoning tactic to increase visibility.

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/wix?keyword=gw2+central+tyria+mastery+points+gui
    • https://static.usrfiles.com/ugd/b8c837_92acc624d2f3472e8150f51cdc7d6fa7.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e0839b1a2534d9abba6fd66bce1cfb6.pdf
    • https://static.usrfiles.com/ugd/9904c2_953c375917454c72ba3ef5fa65178592.pdf
    • https://static.usrfiles.com/ugd/0779a3_487e05c74aa14decb37a7419734ce131.pdf
    • https://cdn.shopify.com/s/files/1/0428/0995/0367/files/21984781364.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58014629257.pdf
    • https://cdn.shopify.com/s/files/1/0436/8557/6857/files/dewalt_dw733_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/capture_one_pro_for_mac_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/6929/2188/files/seus_minecraft_shaders.pdf
    • https://cdn.shopify.com/s/files/1/0435/5781/4421/files/formation_brancardier_croix_rouge_belgique.pdf
    • https://cdn.shopify.com/s/files/1/0433/5324/3806/files/jakurixijupi.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_6c271f5b3a4b4e969896d37d156305e3.pdf
    • https://static.usrfiles.com/ugd/c20ea7_960e0bf1998445acae0d3aa3ec10dbf4.pdf
    • https://static.usrfiles.com/ugd/599026_40977667c18b497faa8211017f7c246b.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_off0000d95a.bin
00597d48dc2bd189cc7e56e602cda7bb5c3f29da007abee7e681a5127fd676f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD95A 5608 bytes
font_01_sfnt_off0000ec6e.bin
036a726db1c4caa1ce3430a65b70475fe377374f788fc844155596d6513917fc
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6E 10420 bytes