Malicious PDF — malware analysis report

Static analysis result for SHA-256 019ba54c47a205f5…

MALICIOUS

PDF

85.0 KB Created: 2020-08-07 03:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 270e05f2a0a5bddb0cfcf65e0d266232 SHA-1: 1ccafec07efc9a07fc8249aa05c3e5246737ea9e SHA-256: 019ba54c47a205f572fd59d45bdf2fc3fe6ee81a201bc596c0dbb3b4adfefbe1
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=ahmad+shah+abdali+book+pdf`. Additionally, it features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=ahmad+shah+abdali+book+pdf
    • http://files.midwestcovers.com/uploads/1/3/0/8/130814258/malikajodug.pdf
    • http://danog.gtmhic.com/uploads/1/3/0/7/130740025/2040766.pdf
    • http://files.wppc-centralflorida.org/uploads/1/3/0/7/130775276/nafiwudavep.pdf
    • http://files.dandowland.com/uploads/1/3/1/4/131437722/kuvosokefoturog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4211/9592/files/i_can_t_hear_people_on_discord.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0767/files/68892825560.pdf
    • https://cdn.shopify.com/s/files/1/0435/7803/2296/files/30992081856.pdf
    • https://cdn.shopify.com/s/files/1/0429/8267/0485/files/bexibovevilanij.pdf
    • https://cdn.shopify.com/s/files/1/0428/8105/6935/files/como_aprender_espanhol_sozinho.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81599599528.pdf
    • https://cdn.shopify.com/s/files/1/0429/4580/6503/files/gimekoxusivifajon.pdf
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/volapizelomebevive.pdf
    • https://cdn.shopify.com/s/files/1/0428/8276/0870/files/nukivufibupejuwuwipo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6225/5013/files/89731131738.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/biranonifupibixazepulem.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00011f3e.bin
a56e4d5629f1c5ef644141a40b11fe79d4d852c7e7cf93e34734fc8bbdcee3c7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11F3E 23584 bytes
font_00_sfnt_off0000dc66.bin
8f8c7367801765c125b23a5dc2ed8a5bbad0397ce6ed2c342c45888d5669d045		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC66 5380 bytes
font_01_sfnt_off0000ee84.bin
0513f85a3857a7ee4ab943c5d999191bd6908fc5f93a7ea063af62c7107c755b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE84 16068 bytes

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