Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae0d9de49824483c…

MALICIOUS

PDF

40.5 KB Created: 2020-08-18 17:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8e2b0c7e0e29ebf13b002ef82d79718 SHA-1: 23a63b371e834976c4d10a0e24a81cf27fae4ee5 SHA-256: ae0d9de49824483c0e0d73d8f059fc2792e36badff6ca65278d112ae5c437a8b
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. This URL is part of a link farm designed to attract search engine traffic, with many embedded links to Shopify-hosted PDFs. The document body, though partially corrupted, contains the target URL and keywords suggesting a lure for a mobile app. The primary intent appears to be redirecting users to a malicious site via the 'ttraff.ru' domain.

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=aol+mobile+app+for+android
    • http://files.followthrumarketing.ca/uploads/1/3/1/4/131437859/fadife_zoxalonokuziz_wigoredu_derodewes.pdf
    • http://vepodo.the1000monkeys.com/uploads/1/3/1/8/131856543/3395505.pdf
    • https://cdn.shopify.com/s/files/1/0437/1031/6694/files/adulteration_of_milk_products.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8775/files/42858827594.pdf
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/lukifolelanurebuzotafulej.pdf
    • https://cdn.shopify.com/s/files/1/0438/5921/4496/files/platform_weighing_scale_for_sale_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0430/3339/5351/files/ragefebotegesajibera.pdf
    • https://cdn.shopify.com/s/files/1/0432/9196/7652/files/16593972861.pdf
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/beck_hopelessness_scale_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2641/3725/files/7_days_to_die_electric_fence.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/blockchain_supply_chain_use_cases.pdf
    • https://cdn.shopify.com/s/files/1/0433/1818/2041/files/aprilaire_1850f.pdf
    • https://cdn.shopify.com/s/files/1/0435/8206/2753/files/structure_arborescente_informatique.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5687/files/30666219267.pdf
    • https://cdn.shopify.com/s/files/1/0430/7825/4753/files/nutux.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/56705513369.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_off0000610a.bin
0390f8096f36cef16afe445fff6b278690040eee65e947387c0f528b08112bbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x610A 5140 bytes
font_01_sfnt_off00007263.bin
632901aa47429f7b50075738310f448b7c21cd13d194b98984d721b8a68f6f46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7263 10256 bytes

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