Malicious PDF — malware analysis report

Static analysis result for SHA-256 5665b87be7746189…

MALICIOUS

PDF

41.6 KB Created: 2020-08-20 10:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e0a543a0a7d70b504bf5651cd2926b2 SHA-1: b78138eb6d9f9c17a802a6ac8731cf8d194babd9 SHA-256: 5665b87be77461894fd40d2e0f0b98fd5194b3fe13c0e826192fc53436f767b3
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text referencing 'Vlc video player iptv apkpure' and includes the malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are hosted on Shopify but point to potentially malicious content. The primary malicious URL is 'https://ttraff.com/pify?keyword=vlc+video+player+iptv+apkpure'.

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=vlc+video+player+iptv+apkpure
    • http://nalojobu.justneighborsvt.org/uploads/1/3/1/4/131438641/5502a2bd.pdf
    • http://vovijo.allmrbriffa.com/uploads/1/3/1/3/131383483/nopezaxox.pdf
    • http://fadiwijo.agnieszkarudnicki.com/uploads/1/3/1/0/131070374/nulijajujoruxazo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/taming_polar_bear_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/3214858294.pdf
    • https://cdn.shopify.com/s/files/1/0449/6372/5480/files/suit_tie_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/4887122519.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2893/files/albergues_camino_del_norte.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7333/files/samojixorokanopu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/area_of_a_segment_of_a_circle_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/7998/2492/files/virology_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/devunosipus.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/embrace_of_the_vampire_2013.pdf
    • https://cdn.shopify.com/s/files/1/0435/3599/0936/files/zulirenorunifuvaxoxadutej.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_off00005cb0.bin
7d17956e5c2b302197508eed019d6512488fed7c5d5f5d620a89c63f52e65476
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB0 5080 bytes
font_01_sfnt_off00006e10.bin
678fce5e68e6da0587530fc35d4da656fc3109f59cc32041b4f995ac882351dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E10 13884 bytes