Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d50d49f1117ed7…

MALICIOUS

PDF

51.8 KB Created: 2020-08-30 06:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45bf841675b214c29f2d2ef458635536 SHA-1: 3e588a7229c28493adcfe8737a32747e0aa0628b SHA-256: 07d50d49f1117ed7cb7f54139385b4dee0a7b7efd1117ddb16c999237e7075dc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting it is a "Berserk official guidebook pdf" lure, likely intended to trick users into clicking the malicious link. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.ru/wix?keyword=berserk+official+guidebook+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/4112/6565/files/mobavonebegekolegujawex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10699911966.pdf
    • https://cdn.shopify.com/s/files/1/0430/3542/6970/files/86752951530.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6944/files/76509363632.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/naxenerazi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5288/3352/files/sugufuxutotudupitigil.pdf
    • https://cdn.shopify.com/s/files/1/0441/2624/0920/files/gamerz_gaming_website_gta_5.pdf
    • https://cdn.shopify.com/s/files/1/0433/6304/1430/files/femazusuribotumedipido.pdf
    • https://cdn.shopify.com/s/files/1/0428/6912/9372/files/present_simple_affirmative_exercises_for_beginners.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a6eff1f61cf49589a0593b918cbcd9a.pdf
    • https://static.usrfiles.com/ugd/e745be_d1e52ac386f1457dac0affae0d4af284.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa28568802844c82bf3acaf25de470f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_71122891b4c64d9488dcbdef0f8eca2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_3266973cf40d4bb08be5c98beabdb23c.pdf
    • https://cdn.shopify.com/s/files/1/0434/3080/5669/files/53957551153.pdf
    • https://cdn.shopify.com/s/files/1/0435/3903/8359/files/lil_wayne_cash_money_millionaires.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/14268970259.pdf
    • https://cdn.shopify.com/s/files/1/0433/0605/7888/files/wizijoxetunotibod.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/fundamental_accounting_concepts.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c8b.bin
68ac224ef2c9ef246d72fb44a0843aea6b966222b1aff33290eaf273af10f672		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8B 5016 bytes
font_01_sfnt_off00006dd7.bin
584c0917a4e20a4af5989ae6d997c7c4e2b12d391fe58581086b1f029f6978ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD7 5272 bytes
font_02_sfnt_off00007fc5.bin
a3bd7a93a1853f85854da2e5a378d04a77c0308350dc2ba37424e57170e7f0af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC5 6152 bytes
font_03_sfnt_off00008fd4.bin
4957143102c6dca2e07f2984dfc076424b04700cf14c2ec1afe869aa9a07725d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD4 10556 bytes
font_04_sfnt_off0000b307.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB307 4324 bytes

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