Malicious PDF — malware analysis report

Static analysis result for SHA-256 1092664477574e20…

MALICIOUS

PDF

48.4 KB Created: 2020-08-30 15:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e9975fb92b1986e93f8ed2a2e2ef0fe SHA-1: ececd73d793e024d7455d06e7aeee0a752f897d0 SHA-256: 1092664477574e202499692467bc0df0ddbe0c2c2585591bacc33f8262d99348
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a redirector URL. The document body, though partially corrupted, contains text that appears to be a search query, suggesting a lure to trick users into clicking the malicious link. The primary malicious URL identified is https://ttraff.cc/wix?keyword=hayvan+%25C3%25A7iftli%25C4%259Fi+ka%25C3%25A7+sayfa, which is flagged as a malicious redirector.

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/wix?keyword=hayvan+%25C3%25A7iftli%25C4%259Fi+ka%25C3%25A7+sayfa
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/ade4e6_64e49096bd164d2db2b580d8495ff3f4.pdf
    • https://static.usrfiles.com/ugd/c63dba_2063a08a04dc4f149e8143986cf0b828.pdf
    • https://static.usrfiles.com/ugd/ae15ca_e9faf9c18b304649890c524f9de83e22.pdf
    • https://static.usrfiles.com/ugd/7d21c0_7ba4bf98963c4d2ea43537fac453f3dd.pdf
    • https://static.usrfiles.com/ugd/c12414_6ebf4c7e5d414c8ab2c7dc4bbade49ab.pdf
    • https://cdn.shopify.com/s/files/1/0457/3619/8300/files/lalenamavebo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/30180265924.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6023/files/acrobat_reader_free_download_for_xp.pdf
    • https://cdn.shopify.com/s/files/1/0431/8658/5749/files/verufugalerug.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/fisica_atomica_formulas.pdf
    • https://cdn.shopify.com/s/files/1/0461/4337/3480/files/find_chegg_answers_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/6274/6517/files/adinkra_symbols_and_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0437/0163/3177/files/92780366520.pdf
    • https://cdn.shopify.com/s/files/1/0431/6066/6274/files/rinumikijavevexizuxofemer.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_off000074b6.bin
7fb6d12f925c082b9466a26ade7a5899c444ff6f2f9c7c84515f3f608f4b2b81
pdf-font-stream PDF embedded font (sfnt) at offset 0x74B6 5264 bytes
font_01_sfnt_off000086c8.bin
b97f59d75c2ec7cd6366c3b60d8bd077977b03cabc53136ac0ac10006f0c0a68
pdf-font-stream PDF embedded font (sfnt) at offset 0x86C8 14824 bytes