Malicious PDF — malware analysis report

Static analysis result for SHA-256 0953d92754526ebf…

MALICIOUS

PDF

40.0 KB Created: 2020-08-30 11:33:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 797666b0cd011eac39b5b8dec25108f5 SHA-1: 70f61c8e587cb63b6c5481f322c983b527437a98 SHA-256: 0953d92754526ebf7c5627abafb42ffa757685140ef64339f9d619e045ecdc9b
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 pointing to Shopify domains hosting other PDFs, which is indicative of a link farm. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/wix?keyword=pozo+a+tierra+horizontal+pdf'. The ML classifier also strongly flagged this PDF as malicious. The presence of embedded URLs and the overall structure suggest an attempt to direct users to malicious content, likely for phishing or malware delivery.

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=pozo+a+tierra+horizontal+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/duxetutupetodidavotu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/xosatowamawupiwir.pdf
    • https://cdn.shopify.com/s/files/1/0447/0449/7818/files/toshiba_blu_ray_player_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/26544535907.pdf
    • https://cdn.shopify.com/s/files/1/0435/7134/7619/files/fitukojolusum.pdf
    • https://cdn.shopify.com/s/files/1/0431/8311/2341/files/integer_rules_addition_and_subtracti.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5901/files/kosidizavifedudusire.pdf
    • https://cdn.shopify.com/s/files/1/0437/7618/0376/files/analisis_y_diseo_de_sistemas_informaticos.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/simple_present_tense_interrogative_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0984/files/malaria_plasmodium_vivax.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/free_arizona_beneficiary_deed_form.pdf
    • https://static.usrfiles.com/ugd/98e298_25fa88b363d14ef4bc7bd25afc24d061.pdf
    • https://static.usrfiles.com/ugd/01bc73_26ea9ed8739b49b69496778379e5ae20.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_off00005ea9.bin
8894d6334bebb0b9fbad4c47e40c57b79b8d56676b998d86145e93f35a7eea50
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA9 5004 bytes
font_01_sfnt_off00006fab.bin
d4dd1b143a09b3ff3433d303cd137f5cf600e554829168f7e7d38cde54f71b55
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAB 10560 bytes