Malicious PDF — malware analysis report

Static analysis result for SHA-256 6888f4b6e1ef57ad…

MALICIOUS

PDF

42.2 KB Created: 2020-08-19 01:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f77be1a2c8557005a4706aa6a3a12592 SHA-1: fd30fdf2eb193e0045c7b4c6bcb2f087ac30cd5d SHA-256: 6888f4b6e1ef57ad96434795fec51ba3fb4e4f1042e8ce20224ee538b7c3c116
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector. This suggests a link farm or redirection scheme designed to lead users to malicious content. 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.com/pify?keyword=contour+cox+channel+guide
    • http://dofetiw.pentictonnewcomers.com/uploads/1/3/1/4/131482975/vamiwozerireluzinar.pdf
    • http://files.ktof.net/uploads/1/3/1/3/131398085/5775041.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9832/5671/files/ver_peliculas_online_2017.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/kukesoribapop.pdf
    • https://cdn.shopify.com/s/files/1/0429/9459/8047/files/suvuvijute.pdf
    • https://cdn.shopify.com/s/files/1/0434/0432/9125/files/gizixonuduzokerububilon.pdf
    • https://cdn.shopify.com/s/files/1/0432/4642/0132/files/encyclopdie_catholique_tho.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3537/files/3d_photos_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1181/files/minecraft_1._14_patch_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/4769/0145/files/degaguzizafuwaxek.pdf
    • https://cdn.shopify.com/s/files/1/0429/7274/1791/files/pudawidamijutilulodeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/3103/5047/files/kabbalah_black_magic.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_off00005db7.bin
98649bdd8c460b3e10e45bdf499f3a836eb9928767ddde2fde0b707ecc444aab
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB7 4996 bytes
font_01_sfnt_off00006e9d.bin
d88acef2f1503c2d36a8ed78cd414078dcf73965ef7014107e14dc134918970d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9D 1736 bytes
font_02_sfnt_off00007723.bin
6a61584d8f62c2a2f275aff7f3531c31d2f0495eed36ab29f84b1a0a96173a22
pdf-font-stream PDF embedded font (sfnt) at offset 0x7723 10928 bytes