Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeaed32be0bbdf31…

MALICIOUS

PDF

50.9 KB Created: 2020-08-30 04:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfa1bc38eb4d4f936721e165adbb0a1c SHA-1: 1ee1c0da07c47f522b9d761ad90d53343890488a SHA-256: aeaed32be0bbdf311186198721150c32deaa78b1837f6ff2c7cb1cde01ecd438
154 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. One critical heuristic identified a direct link to a known malicious redirector at `https://ttraff.com/wix?keyword=hope+is+not+a+strategy+book`. The ML classifier also strongly indicated maliciousness. The document body contains garbled text and the title 'Hope is not a strategy book', suggesting a lure.

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/wix?keyword=hope+is+not+a+strategy+book
    • https://static.usrfiles.com/ugd/dc98cc_ba76b9674df34f879935cfaba54718bc.pdf
    • https://static.usrfiles.com/ugd/b77b08_98ecb08c20a94110a7ad1f80155841be.pdf
    • https://static.usrfiles.com/ugd/3f80ec_f10a7d533a024e7b81595b411c6c88d8.pdf
    • https://static.usrfiles.com/ugd/dcfb95_43295732229e476eaca31772b3fda36a.pdf
    • https://static.usrfiles.com/ugd/36f25b_1938b8c9ac5f471b9b1b2924091addc6.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pamuzinesikajojefex.pdf
    • https://cdn.shopify.com/s/files/1/0430/7261/8657/files/canot_get_to_recovery_server.pdf
    • https://cdn.shopify.com/s/files/1/0429/3450/1535/files/beginner_pink_panther_piano_sheet_music_easy.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4831/files/destinies_of_the_soul_dr_ludovic.pdf
    • https://static.usrfiles.com/ugd/6924eb_94bd48a8e37f4d7eaa27d2994197bf50.pdf
    • https://static.usrfiles.com/ugd/b8c837_04c12010efbb47888fa56a01f3ba7b10.pdf
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/88227848498.pdf
    • https://cdn.shopify.com/s/files/1/0435/4785/2959/files/41972833776.pdf
    • https://cdn.shopify.com/s/files/1/0433/9089/4247/files/superhero_name_generator.pdf
    • https://cdn.shopify.com/s/files/1/0460/9363/1652/files/59986941560.pdf
    • https://cdn.shopify.com/s/files/1/0438/9660/2779/files/naputovotako.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_off00008906.bin
b1554676923cc7eac2ad191117e3b83ba0fdfd9b8c3e6e9a2139d584504dee3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8906 5224 bytes
font_01_sfnt_off00009adc.bin
c527cda5b1de05ec40e8f1dd11f4f22eb535299af8d3037dec580764ebc64bb7
pdf-font-stream PDF embedded font (sfnt) at offset 0x9ADC 10444 bytes