Malicious PDF — malware analysis report

Static analysis result for SHA-256 b693aa1acc28c264…

MALICIOUS

PDF

56.0 KB Created: 2020-08-30 10:40:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cd7dd6eb186b202ff7affaf9cd02d23 SHA-1: 5677ea144c7499ce18bc5d01f8c48d996aeebcf2 SHA-256: b693aa1acc28c264c62fba0209484e5c71caa6e3cd440533fd5bac2d67d7505f
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious URL identified is 'https://ttraff.cc/wix?keyword=josue+yla+terra+prometida+capitulo+1', which is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text along with the malicious URL and numerous other URLs hosted on Shopify, suggesting a tactic to disguise malicious intent or to leverage legitimate platforms for link distribution.

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/wix?keyword=josue+yla+terra+prometida+capitulo+1
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96280370261.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/77068656446.pdf
    • https://cdn.shopify.com/s/files/1/0437/3941/4677/files/11607114724.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/24262503418.pdf
    • https://cdn.shopify.com/s/files/1/0452/6043/9713/files/betrayal_at_baldur_s_gate.pdf
    • https://cdn.shopify.com/s/files/1/0431/6699/0498/files/wonaxiliwevag.pdf
    • https://cdn.shopify.com/s/files/1/0457/8983/9516/files/godomemixojevemefupegajul.pdf
    • https://cdn.shopify.com/s/files/1/0433/9446/5948/files/discord_quote_text.pdf
    • https://static.usrfiles.com/ugd/ca300b_6295f23527b64b6db3faca05058579c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_e37f0d60dca64d2186135b4c078352fe.pdf
    • https://static.usrfiles.com/ugd/63d3ad_07811aa4e3ea4281aaff955036ac696d.pdf
    • https://static.usrfiles.com/ugd/1f5cef_70977ebb35bc433c83f932cda8a87cf9.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/bellini_oven_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/saddleback_basic_english_grammar_book_3.pdf
    • https://cdn.shopify.com/s/files/1/0447/0643/1130/files/catalogo_avon_campagna_17_2020.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_off00009cb0.bin
519d1ad57bc4c13f24066e984d767b1befb12dde2d6db7133a8f02af044545a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB0 5364 bytes
font_01_sfnt_off0000aee2.bin
03e107f2bec22c028d0da142c0fd2bcb1a069e2330f850a02505531c73acfd8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEE2 11096 bytes

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