Malicious PDF — malware analysis report

Static analysis result for SHA-256 190e58f79c29636b…

MALICIOUS

PDF

44.7 KB Created: 2020-08-24 09:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c418d7d36d9d775848ff0822bacde3c3 SHA-1: 5886ab7c92246eca6dea677cbf9f213ed9410e03 SHA-256: 190e58f79c29636b8feb02a78e3a9eeffcf9bad4be8974212841c27be4e04aca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, embedding 16 external PDF links, many of which are hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest an attempt to lure users to malicious sites, likely for phishing or to download further payloads.

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=ecumenism+catholic+answers
    • http://nixap.canaryvilleriders.com/uploads/1/3/0/8/130874388/lixovemopam.pdf
    • http://sunoxoke.laurieolerich.com/uploads/1/3/1/3/131379803/a08b184948e9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0485/3402/files/wikor.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7907/files/heroku_no_such_app.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/bixexumelexulumem.pdf
    • https://cdn.shopify.com/s/files/1/0462/6995/6245/files/dr._ampoule_dual_mask_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/3859/5482/files/inorganic_chemistry_books_for_bsc.pdf
    • https://cdn.shopify.com/s/files/1/0436/0699/9203/files/nopofimakidatemovo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3863/0300/files/22247736499.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/33194688417.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bofudajix.pdf
    • https://cdn.shopify.com/s/files/1/0440/4733/5574/files/xatidibefojakaralelu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wupukibasabozuxijixosi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6491/8165/files/57908407269.pdf
    • https://cdn.shopify.com/s/files/1/0446/6468/4697/files/american_english_file_1_workbook_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3292/6616/files/hydrothermal_synthesis_of_nanomaterials.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000718b.bin
ab492dc41e873c70e1abf832b134f6b88edebf1a85d99a1171930c65a58b3e71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x718B 5088 bytes
font_01_sfnt_off000082bb.bin
c32e327192140a9c14378a3b6dfdb898423f888ce7caf636c196733514c75e8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82BB 9908 bytes

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