Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1228df983b0c33…

MALICIOUS

PDF

42.8 KB Created: 2020-09-06 18:29:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c23fd40dec85a85323e581fd3882c8f7 SHA-1: d2366da90fc57af23b740b6e93c1e451195cd3c9 SHA-256: 0a1228df983b0c33e0e7d0dca027cd98a5f55a770d14c809604d525a2550e309
154 Risk Score

Malware Insights

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

This PDF document contains a link farm, with one critical link pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/wix?keyword=acuerdo+de+confidencialidad+nda+pdf', which is likely intended to trick the user into downloading a malicious payload. The presence of multiple embedded PDF links suggests an attempt to broaden the attack surface or distribute further 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=acuerdo+de+confidencialidad+nda+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53293114795.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/skillet_comotose_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0462/4842/7671/files/baukindergeld_antrag_nrw.pdf
    • https://cdn.shopify.com/s/files/1/0459/7710/8647/files/kijisugaf.pdf
    • https://cdn.shopify.com/s/files/1/0452/1653/0589/files/periodic_table_with_groups_and_periods_labeled.pdf
    • https://static.usrfiles.com/ugd/c068f8_781efecea1c94459b5d95eefe1cab7f8.pdf
    • https://static.usrfiles.com/ugd/ccb1c6_61a6475ef74347b48e4682ae6d44aca8.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7b843f1e83749d39fba0c89e809f944.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ad9e121e30941b399d137c18de57ba9.pdf
    • https://static.usrfiles.com/ugd/28146e_f7263c6353f64698b700cd1910eff69f.pdf
    • https://static.usrfiles.com/ugd/79e5df_f60ca27edee146dcbaeb7708bbc9d62d.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f476750cf7845febaeef278ee60f847.pdf
    • https://cdn.shopify.com/s/files/1/0433/1818/2041/files/girl_meets_girl_anime.pdf
    • https://cdn.shopify.com/s/files/1/0437/8794/4094/files/vupigigunug.pdf
    • https://cdn.shopify.com/s/files/1/0437/3941/4677/files/40913507287.pdf
    • https://cdn.shopify.com/s/files/1/0431/5211/3820/files/bangla_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/7357/6865/files/xaraxokilotibadex.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_off00006828.bin
ba2bbe3267c559c3fcc54b6257aba0e56240d178f6fe1b6fb17b65798652eb7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6828 4960 bytes
font_01_sfnt_off0000791a.bin
c3f73666fac15819558ef9555c072b02c88240d5d1ffc95bb1b03fd194d72e44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x791A 11400 bytes

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