Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e765845553c6b9…

MALICIOUS

PDF

40.3 KB Created: 2020-08-22 17:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3ab7de87a2277eb5aca05e502c05ee9 SHA-1: bb1a684684d3ea9c79000b19fc83b3e8c6281ffb SHA-256: 07e765845553c6b98af09375eaed3a386970745d38a6d458e8a09fc9c62e5d07
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=free+kindergarten+worksheets+color+by+number', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicates maliciousness, supporting the attack pattern of luring users to malicious infrastructure.

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=free+kindergarten+worksheets+color+by+number
    • http://files.tangofloorspace.com/uploads/1/3/0/8/130874317/tofixusa-xenupe.pdf
    • http://tonow.oldschoolsailing.com/uploads/1/3/1/6/131606295/zonijitekojo_xasonitamet_gilapuzenilekev_muraf.pdf
    • http://files.littlefeetdaycarecarmelny.com/uploads/1/3/1/1/131164372/dagolebi_rukotufiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7816/3359/files/measuring_brand_equity_across_products_and_markets.pdf
    • https://cdn.shopify.com/s/files/1/0460/0525/6353/files/lezopipejonegax.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3825/files/hp_elitebook_docking_station.pdf
    • https://cdn.shopify.com/s/files/1/0429/7595/3049/files/27722579962.pdf
    • https://cdn.shopify.com/s/files/1/0437/9679/1456/files/impulse_physics_problems_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0432/9078/8000/files/joluxesafufolufada.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekugoxozeritazol.pdf
    • https://cdn.shopify.com/s/files/1/0434/6842/3330/files/fuzabubuponaxilubo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2281/0268/files/wow_legion_blacksmithing_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/7794/9848/files/simple_poll_discord.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7650/files/allen_bradley_rslogix_5000.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/adulteration_in_food_items_project.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_off00005fdf.bin
28d34f9b0870374bf251fe333623e000adb619bdd427d07bf9b124550dd7251b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDF 5704 bytes
font_01_sfnt_off0000733c.bin
ce2aa52f5c893601e1d3a37c2f978892343d5cf13d627658b1f35a7a923e511c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x733C 9592 bytes

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