Malicious PDF — malware analysis report

Static analysis result for SHA-256 073722671af75798…

MALICIOUS

PDF

42.9 KB Created: 2020-08-14 04:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ca46ea1dde26df1d6eb86a85797a9d7 SHA-1: 96c76d93f94c0b648fb89d1298d5ed22733ea41b SHA-256: 073722671af75798cbc1628bafbf12cedc30dad99915b36f06e608a15a954ede
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links redirects to a known malicious domain, ttraff.com, which is likely used for further malicious redirection. The document body is obfuscated and contains the malicious URL, suggesting an attempt to lure users into clicking the links.

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/pify?keyword=anjali+anjali+pushpanjali+song+free++telugu
    • http://mumuji.autoservicearlingtontx.com/uploads/1/3/0/7/130775169/vaxobojox-kixirek-sazuse.pdf
    • http://files.ourpatchprojects.com/uploads/1/3/0/7/130740316/zufaleruxuliwu.pdf
    • http://xugif.debbieandriullidesigns.com/uploads/1/3/2/7/132740278/6704342.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1958/2110/files/50740359333.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/23262311475.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/44120069321.pdf
    • https://cdn.shopify.com/s/files/1/0433/2306/4488/files/alcalosis_metabolica_por_vomitos.pdf
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/ryobi_gas_trimmer.pdf
    • https://cdn.shopify.com/s/files/1/0429/3355/1260/files/98836687.pdf
    • https://cdn.shopify.com/s/files/1/0427/7813/2636/files/42621276929.pdf
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/38154887778.pdf
    • https://cdn.shopify.com/s/files/1/0433/9712/0151/files/webewino.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_off00005b79.bin
0c40da124be9263203cfd0207320cefdd438c4583efe51aa270554cbc3459b8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B79 5228 bytes
font_01_sfnt_off00006d3c.bin
67d3558ce108d7e288b2ba0e146ff1f6065e2fe17540a2787ed74b72be7206ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3C 15660 bytes