Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bbb33adaa5c7139…

MALICIOUS

PDF

57.5 KB Created: 2020-08-07 04:54:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34fe27e13ef996e181563ef037d34951 SHA-1: 41f46b21fc5071836ff10402029f85ae97a90697 SHA-256: 7bbb33adaa5c7139479b6d493e8317900afa58d675a9084ac25cefeb592da7ad
152 Risk Score

Malware Insights

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

This PDF document employs a SEO link farm technique, embedding numerous links to external PDF files. The primary malicious link, https://ttraff.cc/wb?keyword=belajar%20photoshop%20lengkap%20pdf, acts as a redirector to further malicious infrastructure. The document body, though heavily obfuscated, contains the lure text "Belajar photoshop lengkap pdf" and references the wkhtmltopdf tool, suggesting a deceptive intent to lead users to harmful content through a series of links.

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/wb?keyword=belajar%20photoshop%20lengkap%20pdf
    • http://files.qualitycraftedstoragesheds.com/uploads/1/3/1/4/131437295/6450363.pdf
    • http://files.bigbunsandmore.com/uploads/1/3/1/4/131482950/5040354.pdf
    • http://vafino.saintbrendans-online.com/uploads/1/3/1/1/131164239/mabofemulakosalewi.pdf
    • http://files.drleifrosenberger.com/uploads/1/3/1/4/131406811/4620737.pdf
    • https://cdn.shopify.com/s/files/1/0439/2668/3816/files/ligepufapumuxisidiwuda.pdf
    • https://cdn.shopify.com/s/files/1/0435/9657/8979/files/bokivilibarodokitix.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9566/files/traduire_les_fichier_anglais_francais.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/32208224952.pdf
    • https://cdn.shopify.com/s/files/1/0431/9091/1137/files/sas_advanced_certification_prep_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/22205316212.pdf
    • https://cdn.shopify.com/s/files/1/0444/4710/5191/files/1987_suzuki_quadrunner_250_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/8999/2616/files/59227324225.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/81890303881.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/56178604853.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/89100050455.pdf
    • https://cdn.shopify.com/s/files/1/0440/8098/8310/files/bsc4success_current_affairs.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/242410434.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008025.bin
a3594387fde84600e926b2bf08fff1d1bd764e99524e3c7cdb12ec2473a9422c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8025 5492 bytes
font_01_sfnt_off000092cf.bin
d4990fd31fb27a50cd8b05b8fedd3f54c866f0b1c8ddf85593e08081f192371a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92CF 3076 bytes
font_02_sfnt_off00009f5e.bin
87fef4c259c7957dd3ebb38f4d3e0e8133127e48604e437c7caafbd8dd1a2fac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F5E 10308 bytes
font_03_sfnt_off0000c2d7.bin
6dba5854a972f11ea50690dbd10bd732b527f03a7f02b22fceaad647e390bf0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D7 16392 bytes

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