Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc0ddd6ec0ed79a…

MALICIOUS

PDF

44.2 KB Created: 2020-08-08 10:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24ad2bd6ce9138b316c27a1b6ce368d6 SHA-1: 6d3d210ef1dcbaff83006ae8bb15273e0dac2e48 SHA-256: afc0ddd6ec0ed79a67b42831a2636fc61cd978cdd18f99ba7194123127f0dfe8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, https://ttraff.cc/pify?keyword=guide+to+tarot+pdf, is identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to "Guide to tarot pdf", likely intended to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=guide+to+tarot+pdf
    • http://files.baldingandblogging.com/uploads/1/3/1/6/131637953/safug.pdf
    • http://files.madelinedesigns.net/uploads/1/3/0/7/130775366/jewulomok-wajiroburuza.pdf
    • http://files.mrfirme.org/uploads/1/3/0/7/130776609/7428100.pdf
    • https://cdn.shopify.com/s/files/1/0429/5000/0791/files/fikas.pdf
    • https://cdn.shopify.com/s/files/1/0439/5106/3195/files/zafawukifafifikixubel.pdf
    • https://cdn.shopify.com/s/files/1/0434/3437/7377/files/wipro_aptitude_questions_with_answers_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/dreamweaver_cc_2020_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0440/5490/4997/files/xekatar.pdf
    • https://cdn.shopify.com/s/files/1/0429/2257/3990/files/nukonutiworifamobavoloxol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/komuxabumib.pdf
    • https://cdn.shopify.com/s/files/1/0441/0369/6536/files/timer_for_14_minutes.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/capitulaciones_matrimoniales_en_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/wings_of_fire_book_in_telugu_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/2107/2541/files/avanged_sevenfold_dear_god_lyrics.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000713e.bin
c71e5ccd46ed02a423c99441d8175404c20b08075742a75619d50b5e1c814a05
pdf-font-stream PDF embedded font (sfnt) at offset 0x713E 4856 bytes
font_01_sfnt_off000081d7.bin
a4271ca4a0b242fc77deb03fe4ed451ace0725cf96db8233e6943d6fc0e0977e
pdf-font-stream PDF embedded font (sfnt) at offset 0x81D7 10088 bytes