Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af11a41c89f0513…

MALICIOUS

PDF

40.9 KB Created: 2020-08-25 02:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ed2246614bd4364240340f364900870 SHA-1: 73c2961cf5652cfa8c4ef447ad7c4d5663fa330e SHA-256: 7af11a41c89f05135c73f8e616d234b72a2523d8825691b29e785c7e999ba858
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to live sports streaming apps and a URL that appears to be a redirector. This suggests the document is designed to lead users to malicious sites, likely for phishing or malware distribution.

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=best+live+stream+sports+app+for+android
    • http://butotori.embcmanning.org/uploads/1/3/0/8/130873830/todagefelesu-nulasaguxox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/taniseraguvifololesugom.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/14196721395.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/rovim.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/79341525343.pdf
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/sc_acknowledgement_slip.pdf
    • https://cdn.shopify.com/s/files/1/0437/5016/2581/files/44108404854.pdf
    • https://cdn.shopify.com/s/files/1/0438/4918/7493/files/shepard_smith_reporting_fox.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3789/files/bangladesh_map_file.pdf
    • https://cdn.shopify.com/s/files/1/0435/7252/7267/files/lamuli.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/tobebirumu.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_off0000627d.bin
7e0d23d9f6d6fddcaa1f532aa2edf7fd78287dc4a1c9ef8986216b155166f45e
pdf-font-stream PDF embedded font (sfnt) at offset 0x627D 5296 bytes
font_01_sfnt_off0000746c.bin
d94be104fbada23143d76fe3ed0c3a34ba2cb2a5cc44aed3503c96e922622673
pdf-font-stream PDF embedded font (sfnt) at offset 0x746C 10120 bytes