Malicious PDF — malware analysis report

Static analysis result for SHA-256 65d10258c1a4d7df…

MALICIOUS

PDF

44.1 KB Created: 2020-08-20 13:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9096a46ba5c3f83525c2a983b821613d SHA-1: df19e2ff6b804a13c92bca7e71abceba2bc46dc6 SHA-256: 65d10258c1a4d7df02dcfec940d6d45618b02e648b1029877d768cd33377aafc
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. One prominent link, https://ttraff.ru/pify?keyword=descargar+picsart+premium+apk+2019+para+pc, is flagged as a malicious redirector, indicating an attempt to lead users to malicious content. The document body, though partially corrupted, contains text related to downloading software, reinforcing the lure.

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.ru/pify?keyword=descargar+picsart+premium+apk+2019+para+pc
    • http://xuvagu.liberum13.com/uploads/1/3/1/1/131163658/54c409aa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1615/8359/files/alice_in_wonderland_2020_script.pdf
    • https://cdn.shopify.com/s/files/1/0428/9160/8227/files/advanced_aircraft_systems_download.pdf
    • https://cdn.shopify.com/s/files/1/0451/3896/8729/files/67527373100.pdf
    • https://cdn.shopify.com/s/files/1/0431/4300/4322/files/beep_song_karaoke_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/4904/9499/files/84143398923.pdf
    • https://cdn.shopify.com/s/files/1/0430/5112/2842/files/10612102942.pdf
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/51795484080.pdf
    • https://cdn.shopify.com/s/files/1/0435/3320/5655/files/xavapodezivekutereju.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/fajafavebesu.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_off000069a7.bin
46abb2b85402963bd398090970af2cc9acce4062a9698be7054a2b7aaef293ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x69A7 5768 bytes
font_01_sfnt_off00007d40.bin
32540474e7ee83b5db5aaddbef29387d8e957d9627c0881bc501e58ea342c2a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D40 11616 bytes