Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3721ff448f546eb…

MALICIOUS

PDF

44.4 KB Created: 2020-08-30 17:39:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0cfa11420c70359d8c1004129a2a895d SHA-1: 0aad4f277cc5e6860f7baee376fd81055fd45f1e SHA-256: f3721ff448f546eb4beba70f286aafb4bc34a54e11ca9e0f2dcb623ab0737d92
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious domain, disguised with text related to game redeem codes. This indicates a phishing or social engineering attack aimed at tricking the user into visiting a potentially harmful site. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to obscure the malicious destination.

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=assassin%2527s+creed+odyssey+redeem+codes
    • https://cdn.shopify.com/s/files/1/0432/8367/7339/files/kanopolis_seep_stream_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/9083/6632/files/81265004555.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/supupaxagujemup.pdf
    • https://cdn.shopify.com/s/files/1/0433/5969/9109/files/retavuwezevidav.pdf
    • https://cdn.shopify.com/s/files/1/0436/6699/7398/files/xejizotufogewabagebi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0110/9920/files/majunepen.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8933/files/avicenna_canon_medicine.pdf
    • https://cdn.shopify.com/s/files/1/0430/9683/4212/files/kidelevonufexikisubusi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8402/9854/files/62950379125.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/fax_cover_sheet_template_no.pdf
    • https://cdn.shopify.com/s/files/1/0433/7487/0689/files/55805094039.pdf
    • https://cdn.shopify.com/s/files/1/0462/5619/3687/files/sagenadoduronarewupipuku.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3881/files/51721312353.pdf
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/92638550134.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_off000070c0.bin
77f8b6146cc80f45a5b2fdc9d29feb2f65923e3c01ce2d365f2dcb8e7e4e6fc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x70C0 5180 bytes
font_01_sfnt_off00008245.bin
04b3bc09fc1e024f86d60f284ec01184d65434808e4d4c9a3ae63f7095b52423
pdf-font-stream PDF embedded font (sfnt) at offset 0x8245 10008 bytes