Malicious PDF — malware analysis report

Static analysis result for SHA-256 d497818af1eed919…

MALICIOUS

PDF

42.8 KB Created: 2020-08-06 12:33:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aeaeda9c7f61c455e21e92514e80e518 SHA-1: a947ef8f8e48c5541333719ce446996fb72753ab SHA-256: d497818af1eed91901d56bd9d2e212adadec7a420a24dc8367a2e6a052f0e69d
150 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 'ttraff.com'. This URL is presented within the document body, disguised as a 'bank po syllabus 2020 pdf', indicating a phishing or social engineering lure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=bank+po+syllabus+2020+pdf
    • http://files.morroandjasp.com/uploads/1/3/0/9/130969375/wojerodijudo.pdf
    • http://files.km4kate.com/uploads/1/3/0/7/130775249/5707b3ac388e.pdf
    • http://files.porkrollpalooza.org/uploads/1/3/1/3/131398100/zomir_ravedowikewen_ridokevogebe.pdf
    • http://files.printmedia.nl/uploads/1/3/1/6/131606798/diwogizometeweteru.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0561/files/82859534355.pdf
    • https://cdn.shopify.com/s/files/1/0431/5178/6145/files/vepavamevufobegariz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2043/files/96751397224.pdf
    • https://cdn.shopify.com/s/files/1/0429/7549/4300/files/html_to._net_core.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/zekaxetufomuguwositenuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sujufizolotedugogu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2576/7320/files/62781330672.pdf
    • https://cdn.shopify.com/s/files/1/0435/8435/6507/files/vawunewofositajivejogore.pdf
    • https://cdn.shopify.com/s/files/1/0431/3058/5239/files/64522767728.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/50070374890.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/21107184769.pdf
    • https://cdn.shopify.com/s/files/1/0436/0713/0270/files/length_of_string_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0439/7934/1982/files/kupibekakosuj.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_off000069c0.bin
baeb554ba42b7f7e684c37653e32ed01c16254e2331f50dfd5ec5e03991fb14a
pdf-font-stream PDF embedded font (sfnt) at offset 0x69C0 5568 bytes
font_01_sfnt_off00007cce.bin
39afddbe62a911de014ce449e205a92a44675ea4bfa297b27c8c7b361d404887
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCE 9968 bytes