Malicious PDF — malware analysis report

Static analysis result for SHA-256 a19224a81c522d07…

MALICIOUS

PDF

44.4 KB Created: 2020-08-23 10:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 091af061676a189406b525c51709a4be SHA-1: 609e9d89bb8a06d5f67d2acfcbd75a02f953ed47 SHA-256: a19224a81c522d07e40d3e1f6f389dfada98b89938fa81728d8f8c0282ca3017
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One prominent link, 'https://ttraff.com/pify?keyword=leviathan+raid+guide+datto', is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same malicious URL and a list of other URLs, suggesting a coordinated effort to redirect users to potentially harmful content.

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=leviathan+raid+guide+datto
    • http://kulelese.firstfruithaitiministries.org/uploads/1/3/0/8/130813612/3132729.pdf
    • http://files.pink-backpack.com/uploads/1/3/1/3/131383998/4404670.pdf
    • http://files.2cgaming.com/uploads/1/3/0/7/130740165/4098727.pdf
    • https://cdn.shopify.com/s/files/1/0433/8978/0124/files/mosozedemutobanagepefisip.pdf
    • https://cdn.shopify.com/s/files/1/0449/8564/7272/files/uninstall_python_2._7_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/7319/1588/files/4314887660.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/37661097457.pdf
    • https://cdn.shopify.com/s/files/1/0432/9717/7768/files/cad_soft_tools_to_dwg.pdf
    • https://cdn.shopify.com/s/files/1/0438/0118/2370/files/pumaxenetajegezito.pdf
    • https://cdn.shopify.com/s/files/1/0446/7235/2419/files/contract_to_close_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0433/5376/8090/files/comment_couper_un_document_en_plusieurs.pdf
    • https://cdn.shopify.com/s/files/1/0432/1555/2672/files/meter_liter_gram_conversion_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/50351768002.pdf
    • https://cdn.shopify.com/s/files/1/0448/6758/4162/files/wowejavowupedo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7998/2492/files/binomial_cdf_and_calculator.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_off00006f8a.bin
5d058f7488b1bc5ba19251a6a8aa2aabc6ee49dfeaf210b7196be8cf9908580c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8A 4880 bytes
font_01_sfnt_off0000801e.bin
def116d66291dbc2d3b78576ddc3bdd5f64c3b6b8c72dfa4c1daa350a996a27a
pdf-font-stream PDF embedded font (sfnt) at offset 0x801E 10708 bytes