Malicious PDF — malware analysis report

Static analysis result for SHA-256 78aac9da3d28c45d…

MALICIOUS

PDF

43.8 KB Created: 2020-08-02 08:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aec86cc85a5d43daaa36a609ce0381a3 SHA-1: 31a0381f0a4daa244d58d7f94a0f916879299f2a SHA-256: 78aac9da3d28c45d5c22cfce0b3d0e2f670953d66d7a40a87200b4fd0cf5a204
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a redirector service. The primary malicious URL identified is ttraff.ru, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and appears to be part of a link farm strategy, likely to manipulate search engine results or distribute malicious content.

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.ru/pify?keyword=suzuki+eiger+400+manual+pdf
    • http://files.jenlasheroriginals.com/uploads/1/3/2/6/132682813/sutirudewove-xomukarezoveg-zigazezex-kigawone.pdf
    • http://files.ctcartwork.com/uploads/1/3/2/6/132695278/moxipadokarolas_balebotobovure_fopenomino.pdf
    • http://files.theperfecteventltd.com/uploads/1/3/1/4/131407492/da4be2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7567/4014/files/raspberry_pi_zero_otg.pdf
    • https://cdn.shopify.com/s/files/1/0431/2485/0842/files/vokevetupek.pdf
    • https://cdn.shopify.com/s/files/1/0432/8125/2507/files/vufumetolupemowak.pdf
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/42069437923.pdf
    • https://cdn.shopify.com/s/files/1/0433/2286/7880/files/xewijakedajaraxa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/delubavab.pdf
    • https://cdn.shopify.com/s/files/1/0434/8385/7053/files/99777839965.pdf
    • https://cdn.shopify.com/s/files/1/0434/0210/0886/files/levofujomadeku.pdf
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/34658569859.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/beretiwivegevedi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/17876720661.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/18232059811.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/70405320251.pdf
    • https://cdn.shopify.com/s/files/1/0430/9457/3205/files/kenmore_elite_oasis_dryer.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/33006478920.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006acf.bin
54635629277948d5221a6d0dbd6ee47e5e103be7a08eb02e1eeb2d346d5c7b3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACF 5632 bytes
font_01_sfnt_off00007e02.bin
d80b42345eb7efe77f0c7388f2da8e06ef46c3210e26b47c4ae95db57bf2314d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E02 10588 bytes

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