Malicious PDF — malware analysis report

Static analysis result for SHA-256 1387de7105a3039e…

MALICIOUS

PDF

41.8 KB Created: 2020-08-18 22:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e848e3a3decceb468ee227d3f87a18e2 SHA-1: 2ef6e2f0f9d32dadc0e95695d6c42880865a8c92 SHA-256: 1387de7105a3039ee1a85710312ef3a5adafe279eac63812bb167c33a9713fa2
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=netbeans+ide++ubuntu'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, including benign Shopify links and a potentially malicious one from 'redesignforwholefamilies.com'. The document body contains obfuscated text and the malicious URL, suggesting an attempt to lure users into clicking through to a compromised site.

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/pify?keyword=netbeans+ide++ubuntu
    • http://files.redesignforwholefamilies.com/uploads/1/3/1/8/131857193/jowudakavesof-rusodisoton-zofokizubolas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5702/8001/files/turitome.pdf
    • https://cdn.shopify.com/s/files/1/0435/1806/6843/files/puxejenavalalarifatugu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4704/9623/files/autocad_14_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/pizuxefum.pdf
    • https://cdn.shopify.com/s/files/1/0434/9453/9429/files/faxepinewiwivavidiwigano.pdf
    • https://cdn.shopify.com/s/files/1/0439/4103/6200/files/birexunonarodupeberuzaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/7183/9135/files/kiposoxazito.pdf
    • https://cdn.shopify.com/s/files/1/0433/6369/6799/files/jubilulelezije.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1386/files/9089561559.pdf
    • https://cdn.shopify.com/s/files/1/0431/9415/5170/files/left_view_of_binary_tree.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/vegamaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/dukagidedalufujigexexaja.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_off000065d5.bin
646f129b8e6afd6b65491530c754a3fdb03416ff72b629662a33665f219ffc30
pdf-font-stream PDF embedded font (sfnt) at offset 0x65D5 4800 bytes
font_01_sfnt_off00007634.bin
54170a58ff249286d7177a0f519f0e7a060db95792d32460bbc0082ce747714e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7634 10640 bytes