Malicious PDF — malware analysis report

Static analysis result for SHA-256 84123db02d4c7887…

MALICIOUS

PDF

36.4 KB Created: 2020-08-03 04:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05c63271bf489e582ad97c3ff7986d44 SHA-1: 352199f27b5c9a89d6ac648f4bc2f8ad085743ab SHA-256: 84123db02d4c78870f6f10b7cfb1cb7e1e5489c2a84399272bdf2b2738754278
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, constituting a link farm. One of the primary links directs to a known malicious redirector infrastructure at 'ttraff.com', suggesting an attempt to lure users to malicious websites. The ML classifier also strongly indicated maliciousness, supporting the assessment of a malicious link farm.

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=factorio+3+lane+balancer
    • http://files.rustadtours.com/uploads/1/3/1/3/131380786/votese.pdf
    • http://files.hybridmulticore.com/uploads/1/3/0/7/130775645/xidukajetapilevimori.pdf
    • http://files.vancouverheightsumc.org/uploads/1/3/1/3/131379776/707a63b752a.pdf
    • http://files.talkingaboutscience.com/uploads/1/3/1/6/131637136/fesolefigejelot_kuropafu_siruzovuza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/jowevofezosibajopajatev.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/56830020168.pdf
    • https://cdn.shopify.com/s/files/1/0429/6530/3455/files/sijukowiduxofo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2666/9987/files/85179139561.pdf
    • https://cdn.shopify.com/s/files/1/0443/8307/6518/files/vbscript_for_loop.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/79874140370.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/silufigowazaxin.pdf
    • https://cdn.shopify.com/s/files/1/0434/4895/9141/files/88812578603.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/steam_workshop_mow_as2.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_off00005259.bin
0b62e02c6cab4e3ca3c807b02abaa371fe2c8fc91c89b055ca7be402d7181ddc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5259 4876 bytes
font_01_sfnt_off000062ff.bin
e2c5b10f96df69901563b7ecf366aa0f463e7184f368366c6e6445cf1e754038
pdf-font-stream PDF embedded font (sfnt) at offset 0x62FF 9980 bytes