Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e68d6ddea8792f2…

MALICIOUS

PDF

57.7 KB Created: 2020-08-27 20:12:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30514c6f779a58f0bdd3e934fbedc8f2 SHA-1: 49ac1156cada70b8fdb9f18b02f3a7d47cfa0bc3 SHA-256: 6e68d6ddea8792f21d83c5e1dc337d4bb29dc0b8be51a2127131c45b56d9d91a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=dvd+shrink+3.2+%25E4%25BD%25BF%25E3%2581%2584%25E6%2596%25B9'. This URL is likely used to redirect the user to a malicious site or download further malware. The document body, though heavily obfuscated, contains text that appears to be a lure for software downloads, reinforcing the malicious intent.

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=dvd+shrink+3.2+%25E4%25BD%25BF%25E3%2581%2584%25E6%2596%25B9
    • http://files.livybella.com/uploads/1/3/1/3/131384127/regegejowezixu.pdf
    • http://dizowe.redhawktheaterbc.com/uploads/1/3/1/4/131406069/38e8bf6d8d2da9.pdf
    • http://nafazo.charmed-liebling.com/uploads/1/3/1/3/131384306/1179549.pdf
    • http://files.fairmounthillcf.org/uploads/1/3/0/7/130775156/joxodedaro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6853/8521/files/cook_essentials_pressure_cooker_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/8339/7275/files/obstructive_sleep_apnoea_nice_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/8658/5764/files/56312496005.pdf
    • https://cdn.shopify.com/s/files/1/0437/9960/9505/files/ancient_egypt_state_and_society.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/lagu_blackpink_forever_young.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7644/files/pathogenesis_of_viral_hemorrhagic_fever.pdf
    • https://cdn.shopify.com/s/files/1/0435/6148/4447/files/rimimonujuxilujidipan.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/international_business_concept_environment_and_strategy.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007893.bin
eef56fa95eab41eb73e95941dd24f68e14ea0eb0a74e557df4cae6f67743906a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7893 6624 bytes
font_01_sfnt_off00008ebd.bin
d55a642711ef7f2d3e0b6c1b690c8204208f03b2b6e2dbfc7b136d22de5083b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBD 3512 bytes
font_02_sfnt_off00009b46.bin
b92a506ace42704144efb7db350d1ca08a4664895d54349ae2a97db2c09455b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B46 5120 bytes
font_03_sfnt_off0000acc1.bin
0699c8806ca65fb2a0b4c80fe61f45046b1192bd5a1b707ef85051cb92d0f13d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACC1 13524 bytes

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