Malicious PDF — malware analysis report

Static analysis result for SHA-256 795bccd2acc4c30a…

MALICIOUS

PDF

75.2 KB Created: 2020-09-07 02:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8165c9f757bfc94e7c5ce1c1695e300a SHA-1: 2d0fc1c617156fa2bcedf6df2637fc29aae4992d SHA-256: 795bccd2acc4c30a9a1b8845c4b958d3bebc2d94ad757d5a0646305f136f78b3
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The presence of numerous PDF links suggests a link farm or SEO manipulation tactic to distribute malicious 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.link/wix?keyword=balasaheb+thakre+movie++free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/mekofisenef.pdf
    • https://cdn.shopify.com/s/files/1/0429/6012/6118/files/55181489179.pdf
    • https://cdn.shopify.com/s/files/1/0439/1878/6728/files/lilapakibofuxavule.pdf
    • https://cdn.shopify.com/s/files/1/0428/7430/6727/files/xaxenapinar.pdf
    • https://cdn.shopify.com/s/files/1/0445/4517/9807/files/raspberry_pi_vpn_gateway.pdf
    • https://cdn.shopify.com/s/files/1/0431/0990/8637/files/66507920106.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baludugosutagaxoreforodul.pdf
    • https://static.usrfiles.com/ugd/c3f59f_0e23fabb11034375bdaa292bd8f731da.pdf
    • https://static.usrfiles.com/ugd/c345b0_7175e122373541c7b235b333371b36ba.pdf
    • https://static.usrfiles.com/ugd/02af14_6b87a1ad20194ebfae1ef0d6da4dc4f3.pdf
    • https://static.usrfiles.com/ugd/20d83a_d4a8ac9032944353896ba88337c8106e.pdf
    • https://static.usrfiles.com/ugd/1df9ea_728d1011f9004a9a8f03132dc1c4592f.pdf
    • https://static.usrfiles.com/ugd/33a2e4_2909d49279fa4675ae7048b209a1f8ad.pdf
    • https://static.usrfiles.com/ugd/c2007e_8a73658a1f1347dd8f17732196f25b0f.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_off0000d970.bin
5d3b379a8eeb06d97b59a07dd6e82d7c1360eb9ce95fbddfc91cd0881a561860
pdf-font-stream PDF embedded font (sfnt) at offset 0xD970 5320 bytes
font_01_sfnt_off0000eb65.bin
d5e2fa38a1a828719d28fd22a3c596a02eee02191d4af42e574c6cc04c1ab9cf
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB65 10584 bytes
font_02_sfnt_off00010fc5.bin
8f4d6f031db20ec30f8465e02c1ddf5ae42d707daa92b39fe675dd83361eb042
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC5 4200 bytes