Malicious PDF — malware analysis report

Static analysis result for SHA-256 9133c73f32524ad3…

MALICIOUS

PDF

38.3 KB Created: 2020-08-11 06:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09ce032ede74ce4e3cdad5883221dac2 SHA-1: 533867746706227fd87470be5dedbe7a63b45e34 SHA-256: 9133c73f32524ad3016f17c333b9176cfd122ba5bf631490855787a2c366fa38
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as an embroidery pattern book. The document body is heavily obfuscated but contains the same lure text and the malicious URL. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm or redirection strategy to obscure the final payload. No scripts were extracted, limiting the analysis of direct execution behavior.

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.com/pify?keyword=embroidery+pattern+book+pdf
    • http://files.mylocaldog.com/uploads/1/3/1/3/131383753/pudiboguvifunaromid.pdf
    • http://files.jarboproductions.com.au/uploads/1/3/1/6/131606262/6b5535fb0b6.pdf
    • http://files.printpastelandpaint.com/uploads/1/3/2/7/132712315/sidipofuw_movip_kapaluf_ladavavobej.pdf
    • http://novuxi.monicaleeux.com/uploads/1/3/1/1/131164250/2409198.pdf
    • http://files.mississaugahumanesociety.ca/uploads/1/3/1/4/131453060/xifizosepaxu_xesalito.pdf
    • https://cdn.shopify.com/s/files/1/0440/7335/3366/files/83461473892.pdf
    • https://cdn.shopify.com/s/files/1/0436/9612/8153/files/wafejewixufebibujosomak.pdf
    • https://cdn.shopify.com/s/files/1/0436/4769/7061/files/different_branches_of_science_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/murulu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/stereoisomers_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/2978/1918/files/mifilotuxonez.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/sewogalivikibegazus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rapuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/5491/6003/files/zozonuwaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/viliwoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4407/files/oxlife_independence_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/55885725484.pdf
    • https://cdn.shopify.com/s/files/1/0429/2168/9254/files/lomenunojogir.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c8e.bin
835fb6ea1d70abed1f58025151d38236e05941ba89691243ff4487c2378acdf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C8E 5028 bytes
font_01_sfnt_off00005d8f.bin
4b6648021e1907bca6af09e3c3d0b8af4794d4bd8ac4acd0227adc5c471582f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8F 9616 bytes
font_02_sfnt_off00007e65.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E65 4324 bytes

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