Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3ffafc4f7b80b7e…

MALICIOUS

PDF

60.4 KB Created: 2020-09-17 02:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cf9aab2bf624dbca6d31f9cf4d3d33c SHA-1: ac1388e51b7e74fa86c13215a8aa8487d54a076c SHA-256: b3ffafc4f7b80b7e84c5268c3f81779da3ed351be4a9128fdc5566e8c267be17
152 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to a known malicious domain, ttraff.club. The document body, though heavily obfuscated, appears to reference game-related content, likely as a lure. The presence of numerous external PDF links, many pointing to Shopify domains, suggests a link farm or SEO poisoning tactic to distribute the malicious PDF. The primary malicious IOC is the redirector URL.

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.club/wix?keyword=moon+lord+terraria+guide+1.4
    • https://cdn.shopify.com/s/files/1/0436/9825/8088/files/53706106204.pdf
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/vodivezawatamo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1690/files/cloud_games_emulator_apk.pdf
    • https://cdn.shopify.com/s/files/1/0435/1682/1663/files/flying_car_racing_3d_game.pdf
    • https://89a277f1-db9b-4f83-ab72-039ff4a7a97e.filesusr.com/ugd/fc840b_e25f1f4ede5a4c98ab56cb19d93f7dd8.pdf?index=true
    • https://78c6c203-65d2-4d56-9d0d-328041008c4c.filesusr.com/ugd/3615fb_b78b8fbb1347455eaadc7d4b7a8ceede.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/5491/4981/files/legola.pdf
    • https://cdn.shopify.com/s/files/1/0429/3722/1276/files/34836017317.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7333/files/30413860837.pdf
    • https://cdn.shopify.com/s/files/1/0428/6893/2767/files/83033578608.pdf
    • https://cdn.shopify.com/s/files/1/0483/0081/8593/files/born_a_crime_chapter_summary_shmoop.pdf
    • https://cdn.shopify.com/s/files/1/0436/0781/8398/files/21612499036.pdf
    • https://cdn.shopify.com/s/files/1/0430/3467/3301/files/gajedel.pdf
    • https://cdn.shopify.com/s/files/1/0437/8745/2576/files/19772157843.pdf
    • https://cdn.shopify.com/s/files/1/0429/0514/1411/files/83908060937.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_off0000b03b.bin
ea49356d2fb851c3f07e15d8717b0583bf8ed48514341052429aa96e92088587
pdf-font-stream PDF embedded font (sfnt) at offset 0xB03B 4992 bytes
font_01_sfnt_off0000c159.bin
206e041ce0eb9408cdd8bb1d62aaa500707c8222fb875e2288489f6433371569
pdf-font-stream PDF embedded font (sfnt) at offset 0xC159 10256 bytes