Malicious PDF — malware analysis report

Static analysis result for SHA-256 71d8a5a1430da67c…

MALICIOUS

PDF

43.2 KB Created: 2020-08-23 19:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d55ba6e74c5dbd59e5492f456ec535c SHA-1: ce00ac86251e06197126eb58dd847b2a9ff13f9e SHA-256: 71d8a5a1430da67c1860c9d7a742445a39a3142b4daad21572a3b1440a3e8fea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=delta+airlines+sustainability+report+2016'. The document body also contains this URL and appears to be a lure disguised as a report. The ML classifier strongly indicated maliciousness, and the presence of a redirector suggests an attempt to lead the user to a malicious site for phishing or further payload delivery.

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.cc/pify?keyword=delta+airlines+sustainability+report+2016
    • http://zepovez.valdeckerphotography.com/uploads/1/3/1/8/131856331/togopagi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/menonumuxole.pdf
    • https://cdn.shopify.com/s/files/1/0431/0102/8503/files/uc_browser_apk_mini_old.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/cardiac_arrest_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tozonolemudafolafoxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4048/0155/files/fuwudodejepifaji.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/62119552993.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4585/files/arduino_servo._h_library.pdf
    • https://cdn.shopify.com/s/files/1/0431/0348/6103/files/poravoduviteju.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libuzab.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/fox_soccer_plus.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_off00005c73.bin
4da756bfdb325104bc881676804e07c4f9ff80a75a23636dce7547ad9317dc02
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C73 5416 bytes
font_01_sfnt_off00006eee.bin
b0da365cd03b0c7bdf42cd5b6a5db89e3ab215925a932f295b91bd268fc31228
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEE 10268 bytes
font_02_sfnt_off00009217.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9217 4324 bytes