Malicious PDF — malware analysis report

Static analysis result for SHA-256 01884536362b2198…

MALICIOUS

PDF

41.7 KB Created: 2020-08-11 14:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd0284016126bc6be3b68a4fa6ad2b42 SHA-1: bf0b4eaee75e443648b43cdf0e4ac3278fe9655f SHA-256: 01884536362b2198fb88ed5aa8df3456efa0badf9a0471b4549051ec68f16ceb
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure via the URL https://ttraff.com/pify?keyword=cancionero+para+guitarra+pdf+rock. The ML classifier also strongly flagged this PDF as malicious. The document body itself appears to be obfuscated or corrupted, but the presence of numerous links suggests a link farm or redirection attack.

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=cancionero+para+guitarra+pdf+rock
    • http://leruzuda.midatlanticbrassbandfestival.com/uploads/1/3/0/7/130775045/37b025591dc9173.pdf
    • http://files.dustinrippetoe.com/uploads/1/3/1/6/131637224/lesovavemi.pdf
    • http://files.sprinkledco.com/uploads/1/3/0/8/130874510/fudevuxunuzu.pdf
    • http://files.inthepinesboutique.com/uploads/1/3/2/6/132681861/losesulowepi_pesozamiwuxeles.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8034/1917/files/pioneer_eeq_mosfet_50wx4_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/10410053309.pdf
    • https://cdn.shopify.com/s/files/1/0435/3179/6634/files/vagivulopilinilozi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89647405972.pdf
    • https://cdn.shopify.com/s/files/1/0437/3364/7525/files/zokogelogonopudibazexu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0309/files/composite_gun_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/39258271266.pdf
    • https://cdn.shopify.com/s/files/1/0437/5891/1649/files/breeding_for_important_biotic_and_abiotic_stresses.pdf
    • https://cdn.shopify.com/s/files/1/0434/1897/6408/files/1984_niv_bible.pdf
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/mobilcom_debitel_kndigung_vorlage_kostenlos.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/18929962594.pdf
    • https://cdn.shopify.com/s/files/1/0435/5306/3063/files/gononi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/vubetominuzobosuguxuxetam.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_off00006505.bin
b33ca516d6e02676c6f2f9a2d368efc1057d868ad0e03f7147664f708ce1f556		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6505 5080 bytes
font_01_sfnt_off00007661.bin
f78cbf44c4279e07da04b09eb35a5eb344ac8db6002d9f05fad450b370b0aa2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7661 10384 bytes

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