Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1b96e647259333…

MALICIOUS

PDF

46.3 KB Created: 2020-07-27 05:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3059db35c982fa0f7c7c33526a8cb03 SHA-1: bf9f3da699751247e49a09e04627025af37ac3da SHA-256: bd1b96e6472593330c33737862f6fec7374e9fc9f337cac3220dec6e62f67c5d
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a PDF link farm used for SEO manipulation and traffic redirection. One of the primary links, 'https://ttraff.cc/pify?keyword=costa+mesa+restaurants+guide', is flagged as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure under the guise of providing a restaurant guide.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=costa+mesa+restaurants+guide
    • http://files.degreesof-freedom.com/uploads/1/3/2/7/132740350/tozowavux.pdf
    • http://files.calvaryalliancehiawassee.org/uploads/1/3/0/7/130776321/fd35173506484ed.pdf
    • http://files.nancyhamiltonfilm.com/uploads/1/3/0/7/130776592/3133489.pdf
    • http://files.downriverkaraokeanddj.com/uploads/1/3/1/6/131606876/bdd09559b60a130.pdf
    • http://files.laurabartell.com/uploads/1/3/0/7/130775361/xekulugis.pdf
    • http://files.nancyhamiltonfilm.com/uploads/1/3/0/7/130776592/3
    • https://cdn.shopify.com/s/files/1/0428/2990/6079/files/tolafufasaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8076/files/jetavegabilimadorajozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0133/9304/files/jisujadimarirapakizi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3781/files/29137920957.pdf
    • https://cdn.shopify.com/s/files/1/0433/1343/0686/files/rubofusovo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/gafiwaxolutojovixu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6508/8917/files/sesuwez.pdf
    • https://cdn.shopify.com/s/files/1/0432/7761/5262/files/74957597623.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/guwesimutetalajizobanubel.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3282/files/13346681296.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/61121295968.pdf
    • https://cdn.shopify.com/s/files/1/0433/6166/5192/files/25880987257.pdf
    • https://cdn.shopify.com/s/files/1/0428/5323/6902/files/tiribanuxizovake.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/wagovopiposikeroses.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bamizubonofosexewa.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_off0000782a.bin
c7d5cebca9f6745670c7ac8ed6dcc38acec82ff0145c20aafa74763aa2fa865e
pdf-font-stream PDF embedded font (sfnt) at offset 0x782A 5016 bytes
font_01_sfnt_off0000891a.bin
911fdbbe8660a910f54c9f4f876c1289971be1fff75144edf30b145205ed73f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x891A 10296 bytes