Malicious PDF — malware analysis report

Static analysis result for SHA-256 7024bfc458140f3d…

MALICIOUS

PDF

36.8 KB Created: 2020-08-31 09:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8181b9e2525672a65e7bd7be68e513d SHA-1: ccadfc1dec3bddccac7dab46d9737d47db2d25d5 SHA-256: 7024bfc458140f3dac35dc9449eaf7691834e9a60d8a921ef9724160c6207ecd
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, with one identified as a malicious redirector. The primary malicious URL is https://ttraff.com/wix?keyword=the+supreme+court+lawrence+baum+pdf, which likely leads to further malicious content. The document's structure and numerous links suggest an attempt to create a link farm for SEO manipulation or to distribute malware through seemingly benign PDF files.

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=the+supreme+court+lawrence+baum+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/59548988079.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/seconds_to_mins.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13879903487.pdf
    • https://cdn.shopify.com/s/files/1/0437/4895/0170/files/dadusonu.pdf
    • https://cdn.shopify.com/s/files/1/0440/4376/3862/files/nejuzuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/6502/4416/files/12398020722.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nojigepinipefonumupitos.pdf
    • https://cdn.shopify.com/s/files/1/0437/6172/9685/files/daihatsu_charade_2003_workshop_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5812/files/69830892343.pdf
    • https://static.usrfiles.com/ugd/fd30ac_44ed39b1207f454585241eed304d7bff.pdf
    • https://static.usrfiles.com/ugd/99a8f2_a9a7d4e912724980b0fea1780641752c.pdf
    • https://static.usrfiles.com/ugd/8ab72e_274d44a50bac45a994de741b2987c0c5.pdf
    • https://static.usrfiles.com/ugd/6f58fb_f7cfe46b39a74de6848fb8cc8e7e76b1.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/experiments_in_digital_fundamentals_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7415/files/amsterdam_metro_map_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7619/0361/files/cre_ker_magnet_crosscut_hand_saw_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/1363/5226/files/fixing_sheetrock_around_shower.pdf
    • https://cdn.shopify.com/s/files/1/0428/7227/5103/files/3983770781.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_off00005015.bin
50611873cc32ac3962ad7b59e9f2742949230b49f01abc0d4e98edc9cc86df65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5015 5576 bytes
font_01_sfnt_off000062f3.bin
48b57eaee6706f425b3fa0468593e3074d4620009e80d91b959cbc67cdba7482		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F3 10360 bytes

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