Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aafa7791bde3571…

MALICIOUS

PDF

56.6 KB Created: 2020-08-14 23:39:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d88a394403b23757ba05cbcb6575e01 SHA-1: e9f157fe6138860556e7e213d7033f362b68fe56 SHA-256: 0aafa7791bde3571a73ade6e62764cd85117b2d86996f46ccf20e54df729a2aa
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body also contains this URL and a list of other PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be tricking users into clicking the malicious link, likely leading to further compromise.

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=gladiator+asterix+in+bengali+pdf
    • http://jineze.henrysofbrailsford.co.uk/uploads/1/3/2/3/132302857/8117624.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5459/6250/files/amazon_kindle_edition_als.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7211/files/kagumi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4419/2935/files/wosaxikeromopujaredidupod.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0984/files/693979618.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/79226832178.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/74862163817.pdf
    • https://cdn.shopify.com/s/files/1/0435/0250/2054/files/high_kaliber_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0436/1384/7714/files/vemutiguvuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/8701/0728/files/dragon_city_free_gem.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/tanogofileworudifofureba.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/kalanixokebe.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008253.bin
460e03c3fb53ffbcd44b9c383e97e729e96e579e1fd46b46de546d513e41046b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8253 5448 bytes
font_01_sfnt_off000094ef.bin
aab4344aef3369103c721192647eb81a7c8cba044442cbaa11fe1a9d0888afbc
pdf-font-stream PDF embedded font (sfnt) at offset 0x94EF 9780 bytes
font_02_sfnt_off0000b38c.bin
650b69d939e3280e78d1dfdd1016b12332903aaa2362b73979d071911e24ce3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xB38C 9964 bytes