Malicious PDF — malware analysis report

Static analysis result for SHA-256 b67523f853f00215…

MALICIOUS

PDF

43.0 KB Created: 2020-08-16 16:05:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d15947257b3fbdd6e9d34c5447d23221 SHA-1: e0dd8b1058ab7e8ce3e299fdef010c911b548a21 SHA-256: b67523f853f00215f62efa8da0e4f2ef900f9883b0ff11ca345986880ce7c786
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, including a critical redirector link to ttraff.com, disguised with keywords related to 'Lightroom mobile presets free 2019'. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. The document body itself is heavily obfuscated but contains the malicious URL.

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=lightroom+mobile+presets+free++2019
    • http://sazob.dawnlyndiehl.com/uploads/1/3/0/8/130814328/lebik_xapabagig_reduza_paxilivujapetav.pdf
    • http://files.wbpstars.com/uploads/1/3/1/4/131437243/846e278deb8.pdf
    • http://files.mombabymelts.com/uploads/1/3/0/7/130775968/1449556.pdf
    • http://jewimas.shopbelieveboutique.com/uploads/1/3/0/9/130969352/ab5d396.pdf
    • http://xenapabav.iccueducation.org.uk/uploads/1/3/1/3/131379206/665f31b0228.pdf
    • https://cdn.shopify.com/s/files/1/0437/0595/8553/files/create_folder_python.pdf
    • https://cdn.shopify.com/s/files/1/0436/0326/3650/files/64378682674.pdf
    • https://cdn.shopify.com/s/files/1/0428/7276/6630/files/satekenabiboveramugijafun.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5267/files/22325416227.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/borodipijowixetul.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9165/files/design_of_machinery.pdf
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/odia_song_mp4_hd.pdf
    • https://cdn.shopify.com/s/files/1/0428/6133/0598/files/natura_pest_control.pdf
    • https://cdn.shopify.com/s/files/1/0429/5219/6249/files/sanoxuxugobozazaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/3864/5144/files/madinah_arabic_reader_book_8.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_off00006a45.bin
5fa9c2f45f73eb25a80684a3a55b5c62953f5a17a156ff1af79f8789fffa86b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A45 5668 bytes
font_01_sfnt_off00007d7e.bin
435eb42d9e7bedbda7b64104ef5c57f5761fdb438ffc57469992adefbbecfa65
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7E 9876 bytes