Malicious PDF — malware analysis report

Static analysis result for SHA-256 73b56f1418c7bd21…

MALICIOUS

PDF

43.8 KB Created: 2020-08-31 19:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96a4006a41db2a08acb7e912ba6861c0 SHA-1: 8b2fb7c0fd1c2b56782ee7ab264668a684fe4efa SHA-256: 73b56f1418c7bd216de5484cec8c98735fe80050a47fc6a310ea6e842258bbda
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is also listed as an embedded URL. The document body, though heavily obfuscated, contains text related to 'Epson projector user guide' and the malicious URL, suggesting a lure for a phishing or scam campaign. The presence of a large number of external PDF links also indicates SEO manipulation for malicious purposes.

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.ru/wix?keyword=epson+projector+user+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7013/6230/files/19793693086.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/76758406624.pdf
    • https://cdn.shopify.com/s/files/1/0432/0490/3069/files/18734788765.pdf
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/wofujobesadafubiwiwa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/xewilujowanowabivope.pdf
    • https://cdn.shopify.com/s/files/1/0434/5282/5750/files/21559865802.pdf
    • https://cdn.shopify.com/s/files/1/0440/6870/0310/files/physical_appearance_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0465/0241/2440/files/50064102383.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dutevitijenunolekegek.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4730/files/organ_systems_of_the_human_body_and_their_functions.pdf
    • https://cdn.shopify.com/s/files/1/0440/3786/5637/files/95688554242.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/beatles_complete_scores_download.pdf
    • https://cdn.shopify.com/s/files/1/0444/5736/1575/files/die_fabelhafte_welt_der_amelie_piano_noten.pdf
    • https://cdn.shopify.com/s/files/1/0433/3476/2654/files/42900493786.pdf
    • https://static.usrfiles.com/ugd/b8c837_a182ad5dbe82438aa5e4c7bd490f66f5.pdf
    • https://static.usrfiles.com/ugd/4d400c_e3f1c5c2bfe344bcadeffae900a30e0d.pdf
    • https://static.usrfiles.com/ugd/4c1554_b6e4ddb25b2f43e28cd3c7a7299afcc0.pdf
    • https://static.usrfiles.com/ugd/b5472a_ca7f1fde9a054491baf271e3eec9a856.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_off00006d2d.bin
6fd072724f00fbe805e1fecadfd626575e228f77ff722f0df4c41127a61ad9cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D2D 5032 bytes
font_01_sfnt_off00007e67.bin
3d31127ae27c384b4c1e69fd0f9bd2ea07e2b488c880ee2ca7789304fe99fd75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E67 10548 bytes

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