Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d91d87856208a4…

MALICIOUS

PDF

55.9 KB Created: 2020-08-11 21:39:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c9c502f4acb0c0046bde94a1886d527 SHA-1: 331b924d813ed3c127f460da3d02aae159284883 SHA-256: 69d91d87856208a423a8759fe827c4b6494c388ef12e61534f3673ec65c2331f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Telangana janapada geethalu' and the malicious URL, suggesting a lure for SEO poisoning or ad fraud. The ML classifier strongly flagged this PDF as malicious.

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=telangana+janapada+geethalu+in+telugu+pdf
    • http://files.theperfectrockingchair.com/uploads/1/3/2/7/132740692/zogexekojamunapu.pdf
    • http://files.laurennelsonyoga.com/uploads/1/3/1/8/131871849/c48ec39b5f.pdf
    • http://pabemaja.danhumphreysbass.com/uploads/1/3/0/7/130775403/90853cad5125.pdf
    • http://files.asiamarketcorp.com/uploads/1/3/1/3/131382470/dezipek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/domelefupegusamojof.pdf
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/anthropology_notes_for_upsc.pdf
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/45161791985.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/lopavanusulisepij.pdf
    • https://cdn.shopify.com/s/files/1/0438/1537/0912/files/81839868416.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/bel_ami_maupassant.pdf
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/free_online_auto_repair_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81603963226.pdf
    • https://cdn.shopify.com/s/files/1/0448/9058/7291/files/ford_e350_repair_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8602/8708/files/functional_strength_training_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/0140/4830/files/subutowu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9009/1940/files/ssx_tricky_ps2.pdf
    • https://cdn.shopify.com/s/files/1/0440/3865/2069/files/nugovixafikizuviberiwa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000553d.bin
3b29e9c1d6ef53ece291de6749108692f8567078c29d2ae3c13e23c71c50e7e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x553D 5056 bytes
font_01_sfnt_off00006675.bin
d5af1d71331c9e19d0b2536360d6102c4b0d472df4af4f4b72e6a4a7a0894f5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6675 29004 bytes
font_02_sfnt_off0000a5f4.bin
6fc03753f5c8f362f649e4799e85c3932ff670edd08ca27fa56d72ab967f32fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5F4 14244 bytes

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