Malicious PDF — malware analysis report

Static analysis result for SHA-256 569f122165b52235…

MALICIOUS

PDF

40.1 KB Created: 2020-08-09 15:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6c0f065bf3a54b51a69f9e8c1a2cc83 SHA-1: 3141201fff28175b2299ea11d14a3761f67534d8 SHA-256: 569f122165b522351e2c0a03dbb7342ac6adddabb8e28e272bb0023c5d02789b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=data+structures+and+algorithms+in+c+goodrich+pdf'. This indicates the document is designed to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many pointing to unknown or potentially malicious domains, further supports the malicious intent. No scripts were extracted from this sample.

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=data+structures+and+algorithms+in+c+goodrich+pdf
    • http://nobajuk.mikebergenart.com/uploads/1/3/1/6/131606490/nuxoge-givim-pivipokagarir.pdf
    • http://files.buckhamgallery.org/uploads/1/3/1/3/131379410/3043116.pdf
    • http://files.leatherlondonguide.com/uploads/1/3/0/7/130775033/5542536.pdf
    • http://files.havenhomeindia.org/uploads/1/3/0/9/130969680/luwifamaxa.pdf
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/77892951373.pdf
    • https://cdn.shopify.com/s/files/1/0437/2260/4695/files/bticino_classe_300x.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/88594191060.pdf
    • https://cdn.shopify.com/s/files/1/0434/4895/9141/files/lineages_of_the_absolutist_state_perry_anderson.pdf
    • https://cdn.shopify.com/s/files/1/0435/3956/2645/files/java_method_default_value.pdf
    • https://cdn.shopify.com/s/files/1/0431/5562/0006/files/34470839992.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/94985559860.pdf
    • https://cdn.shopify.com/s/files/1/0428/0690/2950/files/pikimisoxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/48857958281.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9959/files/indesign_vertical_text.pdf
    • https://cdn.shopify.com/s/files/1/0438/0501/6226/files/cars_and_drives_mod_1._7._10.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005055.bin
ee041229426f322e2bb6e01eaab902e334db0ac8d7c6fe8616692af62dcc31a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5055 5452 bytes
font_01_sfnt_off000062b3.bin
45201a3cef3e46d02640f368373bce199917cc8ea316ec383e94b048eeda875f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B3 10236 bytes
font_02_sfnt_off00008504.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8504 4324 bytes

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