Malicious PDF — malware analysis report

Static analysis result for SHA-256 c42367abf60bb9f0…

MALICIOUS

PDF

55.2 KB Created: 2020-08-15 06:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be1a540c7d151d6d79f0ca61a9e91edd SHA-1: 66bd1d811c3acf26039b9d24ce83eacf394e7065 SHA-256: c42367abf60bb9f0f01d44c3f9f058ef2c861659520cf4dd431bddfe8bfeab45
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector. The document body, though heavily corrupted, contains the text 'daily attendance register format in excel' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous PDF links and a malicious redirector indicates a phishing or scam attempt.

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=daily+attendance+register+format+in+excel
    • http://fazesi.teresaverney.co.uk/uploads/1/3/0/7/130776819/1620404.pdf
    • http://files.blackhillsponderosaplace.com/uploads/1/3/1/4/131437873/d9c090fc.pdf
    • http://tebofoj.wilsonlee168.com/uploads/1/3/1/4/131437812/salufajekuzoz_sokukofoda.pdf
    • http://kuvufixo.hanskombucha.com/uploads/1/3/1/3/131398140/1123748.pdf
    • http://files.thrivingdrs.com/uploads/1/3/1/3/131380107/4891281.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4216/files/dewukamizevupeti.pdf
    • https://cdn.shopify.com/s/files/1/0427/5788/2022/files/37275436949.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61238086127.pdf
    • https://cdn.shopify.com/s/files/1/0429/6992/3740/files/92027003851.pdf
    • https://cdn.shopify.com/s/files/1/0433/9027/1651/files/29577227063.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/21848522869.pdf
    • https://cdn.shopify.com/s/files/1/0437/0235/4070/files/hotline_bling_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9662/files/74101746330.pdf
    • https://cdn.shopify.com/s/files/1/0430/3110/1603/files/93423881917.pdf
    • https://cdn.shopify.com/s/files/1/0433/4934/4421/files/sexasapibufuzovomuxuwuzij.pdf
    • https://cdn.shopify.com/s/files/1/0436/5117/0457/files/91541849483.pdf
    • https://cdn.shopify.com/s/files/1/0431/6508/9949/files/ladasufisaxivifop.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007cb6.bin
5149cf6e57ec037ef0f07bb837630aea7978a82d527bdb4ccc9056a144765193		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB6 5508 bytes
font_01_sfnt_off00008f5d.bin
c198a591ae584e5ce0ba4e9356ad643509fbd09026bb86d1b1e1e191a79662f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F5D 1596 bytes
font_02_sfnt_off0000977e.bin
0a2a46b862f2596b26699c13912099a98b88d751bdbac30916a30611d6510865		 pdf-font-stream PDF embedded font (sfnt) at offset 0x977E 9960 bytes
font_03_sfnt_off0000b9c1.bin
18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9C1 16144 bytes

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