Malicious PDF — malware analysis report

Static analysis result for SHA-256 754a105f42911a36…

MALICIOUS

PDF

39.7 KB Created: 2020-08-27 22:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1318041ec64496aa9bfd0d2c22af2708 SHA-1: 5a160b66636ed61953abf45d2649fd2af2a46d21 SHA-256: 754a105f42911a36546956f05945471eb2f984353d9e4da4b103a59b717b31a1
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 Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or to obscure the true malicious destination. The primary malicious link, https://ttraff.com/pify?keyword=mans+search+for+meaning+free+downloa, is identified as a redirector to malicious infrastructure. The document body, though heavily obfuscated, contains references to the malicious URL and benign-looking PDF filenames, reinforcing the lure of a free download.

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=mans+search+for+meaning+free+downloa
    • http://nakavo.vallenduuk.pl/uploads/1/3/1/0/131070382/labolilasuk.pdf
    • http://files.hdmun.org/uploads/1/3/1/4/131437982/gowajuf-tunivesuji.pdf
    • http://files.newerabulldogges.com/uploads/1/3/1/3/131380870/kovotusewol.pdf
    • http://files.servantsofchristinfo.org/uploads/1/3/2/6/132682930/07c24.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/1952/5531/files/sufarozar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kopamidije.pdf
    • https://cdn.shopify.com/s/files/1/0451/6282/3834/files/jurnal_sejarah_asia_selatan.pdf
    • https://cdn.shopify.com/s/files/1/0434/2464/5272/files/cambria_math_font_ttf_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/3551/5290/files/form_action_route_laravel.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/divadopebemunejufexa.pdf
    • https://cdn.shopify.com/s/files/1/0435/1790/3008/files/difference_between_hygiene_and_sanitation.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/dijijitimegamefunagi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekosipavejidowusa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98629167596.pdf
    • https://cdn.shopify.com/s/files/1/0437/8699/3813/files/clash_of_clans_cheat_2019.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_off00005112.bin
17cef62f227177e5ef71aafdba52bdb2d92e5dcebe07cb69dbafbf0c01b39a07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5112 5240 bytes
font_01_sfnt_off000062b5.bin
eb1a7d2247deb73d7e397bac756290913bd7ff192b9cae1b6fd1029a4230f00c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B5 9724 bytes
font_02_sfnt_off000083f5.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83F5 4324 bytes

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