Malicious PDF — malware analysis report

Static analysis result for SHA-256 88e1ee269740d04c…

MALICIOUS

PDF

45.4 KB Created: 2020-08-20 13:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e46e15781a0da7035fde6b935deb3666 SHA-1: 051c4c6d9986ff575b3b93d6d01f9f8928a228d0 SHA-256: 88e1ee269740d04c2bc36a24bea5ed7a62f37c4d49eaea569e2d035e4135df7d
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=greedfall+reputation+guide', which is designed to lure users to malicious infrastructure. The document also hosts a large number of external PDF links, many of which are hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The ML classifier 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=greedfall+reputation+guide
    • http://files.thedragonridersofarvain.com/uploads/1/3/1/4/131437370/zajarabad-bojexepedakowo-fiwejuwegize.pdf
    • http://files.northstarchapter.org/uploads/1/3/0/7/130776661/vunisubavesubizom.pdf
    • http://konow.thedailygarden.us/uploads/1/3/2/6/132680813/funovesumetin.pdf
    • https://cdn.shopify.com/s/files/1/0430/5246/6325/files/13810063147.pdf
    • https://cdn.shopify.com/s/files/1/0433/6776/0028/files/thesis_in_mathematics_education_in_the_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0429/8519/3621/files/jifudaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gejazopemovaro.pdf
    • https://cdn.shopify.com/s/files/1/0451/6688/7061/files/la_arqueologia_del_saber_foucault.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5142/files/20811775233.pdf
    • https://cdn.shopify.com/s/files/1/0437/8640/4000/files/rig_veda_english_translation.pdf
    • https://cdn.shopify.com/s/files/1/0437/4872/0789/files/best_free_solitaire_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8095/files/62979818557.pdf
    • https://cdn.shopify.com/s/files/1/0432/8158/0188/files/pisezed.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006673.bin
63c1caa73270c3b5a175556ee3c72b73a9eb6960353fc0a9b1b69aaeedbe8aad
pdf-font-stream PDF embedded font (sfnt) at offset 0x6673 4944 bytes
font_01_sfnt_off00007754.bin
7a70afdf4b39f73e098d6b3b2ac9de0e9f1c310fd8fe43a13a9f51cdaef4a41f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7754 10312 bytes
font_02_sfnt_off00009a57.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A57 4324 bytes