Malicious PDF — malware analysis report

Static analysis result for SHA-256 c972991bca60bd43…

MALICIOUS

PDF

46.9 KB Created: 2020-08-01 17:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89e9b71571af341dd537f28a19663063 SHA-1: 5b0b48128123a3d23fcc64602ae48eaad67470a3 SHA-256: c972991bca60bd436b78b7bebeb7875e9dbcd6a3bf53be5de9a2cd0bfd1ef98b
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=autoboxing+in+java'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external PDF links, with the primary one being 'https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78986196578.pdf'. The document body is heavily obfuscated but contains the same redirector URL. The combination of these factors indicates a malicious attempt to lure users to potentially harmful content.

Heuristics 3

  • 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.
  • 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=autoboxing+in+java
    • http://files.obpassociation.com/uploads/1/3/1/6/131606923/5db77eac.pdf
    • http://files.garfielddiamondsports.org/uploads/1/3/2/7/132740339/gixozerewi.pdf
    • http://files.fatherheartcanada.com/uploads/1/3/1/6/131637072/nemijedimupozojiviw.pdf
    • http://files.bookhivebeerclub.com/uploads/1/3/0/9/130969910/f65beae6b726.pdf
    • http://files.colacotwayartstrail.com/uploads/1/3/0/7/130739510/ba2439c0362fa77.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78986196578.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/babape.pdf
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/42154630498.pdf
    • https://cdn.shopify.com/s/files/1/0436/0775/2866/files/zojadanotazulimul.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/lujekagaseteviwitifelipu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7739/4847/files/vetovubazo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4375/0049/files/jifitipuxadarovitojajek.pdf
    • https://cdn.shopify.com/s/files/1/0433/6418/8312/files/92869206381.pdf
    • https://cdn.shopify.com/s/files/1/0436/0175/6323/files/tewusaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/3654/0056/files/27428426668.pdf
    • https://cdn.shopify.com/s/files/1/0431/8081/8581/files/64459518444.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/fobifenusiwedavaliga.pdf
    • https://cdn.shopify.com/s/files/1/0436/4953/2069/files/27882316790.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e10.bin
9130b667b92d0e1e29d966dbdae595d5aa9cdfc9fafbf7818bfbf69e20f6b1f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E10 4880 bytes
font_01_sfnt_off00007ed6.bin
3fbc33501ff3638c80ab5c473c3b1e4a0d45b8079dac1f8c9fe88ced693bddd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED6 15384 bytes