Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd0a46c3ecd0447…

MALICIOUS

PDF

46.0 KB Created: 2020-09-07 08:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e246cd914d6bf1d9b515b4244c21b164 SHA-1: 2df85521edd4120baae4e56a27aa37040ee8a1a8 SHA-256: 6fd0a46c3ecd04473d89e036577cd68d491fce2d24506fb41a76527482fea4f0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL. This suggests the file is designed to lure users to malicious infrastructure, likely for phishing or malware delivery.

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=air+datepicker+format
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/599026_52c3b2828e0b433fb6681fef65824c65.pdf
    • https://static.usrfiles.com/ugd/4cf28d_eb2074a6b42f4186a042429b3effe5a1.pdf
    • https://static.usrfiles.com/ugd/912de2_2d3355dd7a1b40bc9d815dd1c501422e.pdf
    • https://static.usrfiles.com/ugd/83b1b3_e050f8cf701e4d41850dac61a759262a.pdf
    • https://static.usrfiles.com/ugd/8f6098_bd027b89c2384ed0867162d92b05e3c5.pdf
    • https://cdn.shopify.com/s/files/1/0436/9891/3435/files/61831575834.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0657/files/aspekto_ng_pandiwa_worksheet_for_grade_7.pdf
    • https://cdn.shopify.com/s/files/1/0439/1115/1768/files/97482227903.pdf
    • https://cdn.shopify.com/s/files/1/0436/8757/5705/files/57475532012.pdf
    • https://cdn.shopify.com/s/files/1/0432/4796/0232/files/twisted_nerve_whistle_rap.pdf
    • https://static.usrfiles.com/ugd/b8c837_19bf628f17bd479e96ab3a433509fdc4.pdf
    • https://static.usrfiles.com/ugd/a13bc2_e25f713e89b44cc09c40222d706f75df.pdf
    • https://static.usrfiles.com/ugd/5899d5_61056a55f7d74483a9606288962fa961.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sivuduveserekolagaxabulux.pdf
    • https://cdn.shopify.com/s/files/1/0439/8625/6030/files/convert_idml_to.pdf
    • https://cdn.shopify.com/s/files/1/0446/2074/2819/files/advocare_24_day_challenge_cleanse_phase.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/57091188493.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/lubifoferosumas.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_off00006cfd.bin
2b852a47240546bbf1ac54f621b84d9d8f7c2ec0de187b96334a8f9a5cecbee7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFD 5144 bytes
font_01_sfnt_off00007e72.bin
49496faaea35913bfbb0067b2be5fbc958b1557395f22869bd9595497745818a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E72 14084 bytes

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