Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbef3ab08bae9f13…

MALICIOUS

PDF

54.2 KB Created: 2020-08-07 01:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7901d0b94f466af3f93aa112e570704 SHA-1: e030c4877b80752581301a86849729d0f3643698 SHA-256: cbef3ab08bae9f1374fd3338f81cfab3fabdcdc4e72f9e8a25ca4bb6d7410284
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with a primary malicious redirector URL identified. The document body, though heavily obfuscated, contains the malicious URL and text suggesting it's a magazine PDF. This indicates a likely phishing or malware delivery attempt, leveraging a lure of legitimate-sounding content to redirect users to malicious infrastructure.

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=banking+chronicle+magazine+august+2020+pdf
    • http://lason.arabellaboutiqueofnmb.com/uploads/1/3/0/7/130775735/048b8bbd95.pdf
    • http://files.catcollaborative.com/uploads/1/3/1/6/131637307/9990369.pdf
    • http://files.bighammershields.com/uploads/1/3/2/7/132740362/709975.pdf
    • http://luzuki.backtobal.com/uploads/1/3/1/4/131438477/7364165.pdf
    • http://files.precisionrifle.shop/uploads/1/3/1/3/131383319/996c38e08b48f.pdf
    • http://luzuki.backtobal.com/uploads/1/3/1/4/13143847
    • https://cdn.shopify.com/s/files/1/0431/5407/9910/files/felegirogalemuxatejo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4207/8877/files/28407286978.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/24134979195.pdf
    • https://cdn.shopify.com/s/files/1/0436/0421/3917/files/leed_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/38697843552.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3574/files/6132408921.pdf
    • https://cdn.shopify.com/s/files/1/0431/3907/2161/files/surapatok.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3021/files/47318635525.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/wujofivozepajerosajiso.pdf
    • https://cdn.shopify.com/s/files/1/0433/3741/6869/files/jenis_afasia.pdf
    • https://cdn.shopify.com/s/files/1/0432/8108/8670/files/tubilobiwotogusuge.pdf
    • https://cdn.shopify.com/s/files/1/0428/3334/6719/files/56219292200.pdf
    • https://cdn.shopify.com/s/files/1/0436/1371/6643/files/dutirizerivagagonimatoli.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000088ad.bin
16dd2821b08721629b34a39f161504edd6649a48bff4f91e992ab8d433a8433b
pdf-font-stream PDF embedded font (sfnt) at offset 0x88AD 6004 bytes
font_01_sfnt_off00009d01.bin
23619c3ec21e541971ed7810a0970ded673932853fef59acb8b0eb565fa7088a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D01 9968 bytes
font_02_sfnt_off0000bf6f.bin
ee8afa51e50492bdf4d25b6b01818d2021856a0eb5271b70f188e6d094f25891
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF6F 2832 bytes