Malicious PDF — malware analysis report

Static analysis result for SHA-256 69a0113bd27d7558…

MALICIOUS

PDF

46.5 KB Created: 2020-08-09 16:38:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0acd251845c0e342bb6512a06fd3fc87 SHA-1: dd961e5a5e7e0fa1839f88edf333772c75e85ede SHA-256: 69a0113bd27d7558a3f0683ce19443331fdf64b42e2263566b2c9be63e8f6644
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external sites, indicating a link farm or SEO spamming operation. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of this malicious infrastructure. No scripts were extracted, but the presence of numerous links suggests an attempt to drive traffic to malicious or spam content.

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=anemia+diet+plan+pdf
    • http://madafi.jeremeleonard.net/uploads/1/3/0/8/130874493/03cf981655c607.pdf
    • http://files.cristinavannel.com/uploads/1/3/1/3/131383825/nevelogugi-pufixobolobig.pdf
    • http://files.artnitetexas.com/uploads/1/3/2/6/132682989/4204834.pdf
    • http://files.saimmconsulting.com/uploads/1/3/0/7/130740376/vovulozanurelovuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/7522/1157/files/capillary_refill_time_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0429/0550/1852/files/pci_simple_communications_controller_driver.pdf
    • https://cdn.shopify.com/s/files/1/0428/5697/2455/files/sugomibafazofakuni.pdf
    • https://cdn.shopify.com/s/files/1/0433/4655/9127/files/flagelos_bacterianos.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5688/files/kasafipabirir.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/64209625802.pdf
    • https://cdn.shopify.com/s/files/1/0439/8658/3710/files/upsc_mains_mathematics_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0433/4626/4213/files/xupefalas.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/41027715802.pdf
    • https://cdn.shopify.com/s/files/1/0431/4211/9592/files/52565942461.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80804151078.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.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_off000078f1.bin
acff674cd2df999db0a2184ad8deb87141efb0c05fe08ae3759e2146e87cd09a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F1 4904 bytes
font_01_sfnt_off00008993.bin
e9d3fc210fcd6928c250cc099e15554b20b828f6b736a2a95527a8ee820baf0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8993 10432 bytes

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