Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e63215bbe654db…

MALICIOUS

PDF

60.3 KB Created: 2020-08-15 06:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc1f88415cd06f7bc9cb02448aa83df7 SHA-1: 226bdef73dbfa9b0bbfd9d79520c3b4568aaada4 SHA-256: 11e63215bbe654db20f13080cd1107b711caaf39eb83ef5dc9ec6f41c79a23d3
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a redirector to malicious infrastructure. The document body, though corrupted, suggests a lure related to a 'Minecraft guide to farming book'. The presence of many external PDF links, some pointing to benign Shopify URLs and others to unknown domains, indicates an SEO link farm strategy. The primary malicious URL identified is https://ttraff.cc/pify?keyword=minecraft+guide+to+farming+book+big+w, which is likely used to redirect users to further malicious 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=minecraft+guide+to+farming+book+big+w
    • http://files.joyellamills.com/uploads/1/3/1/4/131409677/60564fff88a.pdf
    • http://files.ionajonesillustration.com/uploads/1/3/1/4/131454986/5329239.pdf
    • http://files.thedancefx.net/uploads/1/3/0/7/130775516/552eb135cf5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/approximation_questions_for_sbi_po_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/3188/8035/files/rimujubujebulop.pdf
    • https://cdn.shopify.com/s/files/1/0446/1549/9939/files/dalagirugubanerexa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9488/files/zirezuzoboj.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/fifijuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/60324081452.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/bevor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a0bf.bin
c06b182795526b760d5f44224c4bf2acc99e46d4d7d531b064b5acaa7901ba4a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA0BF 5312 bytes
font_01_sfnt_off0000b2c4.bin
5982b61c823706ebc5c74577d8e82eb2e03d5872e7161afb112246ad3d5e1e23
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C4 10420 bytes
font_02_sfnt_off0000d667.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xD667 4324 bytes