Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6f3fae91c572b9…

MALICIOUS

PDF

40.9 KB Created: 2020-08-29 09:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0498486e8402fd726f67c292f44a718 SHA-1: cc4d38bdd5e31e6a8d9cb594f576aec9e1d8b108 SHA-256: 8e6f3fae91c572b9881a04a7edb95eb5e12f71f951aa0e3ae08bfc7e175f13f6
152 Risk Score

Malware Insights

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

The PDF file contains numerous links to external PDF documents, a technique often used for SEO poisoning or to host phishing content. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/wix?keyword=prwora+fact+sheet', indicating a malicious intent to redirect users to harmful sites. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=prwora+fact+sheet
    • https://static.usrfiles.com/ugd/b8c837_87fc3ce6f357494f8fb2ec2520ea550b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b4a08d7316f94fae96f2347e37abd713.pdf
    • https://static.usrfiles.com/ugd/b8c837_35c6b513fa364f7789eabe2784f1ec77.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ba1575a95e042ae8e625d3dd533067c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e4d68cb59ec4e08b0337687bd48d99e.pdf
    • https://cdn.shopify.com/s/files/1/0459/9942/3647/files/consumer_reports_power_washers_2017.pdf
    • https://cdn.shopify.com/s/files/1/0437/1621/4936/files/gosasel.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/datopipodugikedopokivizum.pdf
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/15531078582.pdf
    • https://cdn.shopify.com/s/files/1/0441/0382/7608/files/98301817359.pdf
    • https://cdn.shopify.com/s/files/1/0452/3445/4688/files/bajarangi_kannada_movie_video_songs.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/endless_alleluia.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1438/files/bigonenovur.pdf
    • https://cdn.shopify.com/s/files/1/0433/7221/6483/files/best_ereader_fors_reddit.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_off0000634a.bin
9ede98a7d3033f0f85212c89aca7774b147543d2e9a3624941bad639eb3aa7c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x634A 5028 bytes
font_01_sfnt_off00007468.bin
f94ad49e66139bd1979205d9faf4d3305c19f41ec5abbaf236f74fff887a1f09
pdf-font-stream PDF embedded font (sfnt) at offset 0x7468 10248 bytes