Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d9e6499362f8cdf…

MALICIOUS

PDF

40.2 KB Created: 2020-08-30 10:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cd0b5eba089106e3599e913400bedd8 SHA-1: a15c201a719db6ca15bb5c08c597bc1e506001fe SHA-256: 0d9e6499362f8cdf09bbec6694e282eb2b80b6b384b8f9436ec9ddc291e00a39
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=a%2525C4%25259F%2525C4%2525B1r+roman+indir'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the first being 'https://cdn.shopify.com/s/files/1/0432/7361/7576/files/vasoganesiwonoziruxufotu.pdf'. The ML classifier also strongly indicated maliciousness. These factors suggest the document's primary purpose is to lure users to malicious infrastructure.

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/wix?keyword=a%2525C4%25259F%2525C4%2525B1r+roman+indir
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/7361/7576/files/vasoganesiwonoziruxufotu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7265/8335/files/bundesagentur_fr_arbeit_stellenbeschreibung.pdf
    • https://cdn.shopify.com/s/files/1/0429/6612/2662/files/88611346728.pdf
    • https://cdn.shopify.com/s/files/1/0431/8022/8757/files/60295958953.pdf
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/29699483943.pdf
    • https://cdn.shopify.com/s/files/1/0439/1885/2264/files/65739850237.pdf
    • https://cdn.shopify.com/s/files/1/0433/8004/8037/files/xelavukizes.pdf
    • https://cdn.shopify.com/s/files/1/0428/7699/3695/files/42934929979.pdf
    • https://cdn.shopify.com/s/files/1/0432/1394/7041/files/basic_guitar_learning_book.pdf
    • https://static.usrfiles.com/ugd/b8c837_1948a1f182a64a24bd371e375ea045b1.pdf
    • https://static.usrfiles.com/ugd/906e9f_0f23300643094e459c830ba7030631b5.pdf
    • https://static.usrfiles.com/ugd/10b11f_557ef9adb0214150a28c22eec9a18ed0.pdf
    • https://static.usrfiles.com/ugd/b8c837_614f1d280d8e403db046dc441e9ca659.pdf
    • https://static.usrfiles.com/ugd/d2751c_cd085712a6754201b2d566b248a1ebd4.pdf
    • https://static.usrfiles.com/ugd/b8c837_daf4ec05f5bf402faf6d38e30f2777ea.pdf
    • https://static.usrfiles.com/ugd/e3325f_454a1793dc734b30944aa33a1d626930.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000524a.bin
43999eb09cee888b6d76de5d13f57b2c8f58bc0ed6f1ee14ffb3e9ae2fea487f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x524A 4604 bytes
font_01_sfnt_off000061b3.bin
f294e9150ad765f38d980da0127e34725c452c8c1d836a36bcdeb9ff8d9af2cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B3 10404 bytes
font_02_sfnt_off00008468.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8468 4324 bytes

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