Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc48c902fd02fb5c…

MALICIOUS

PDF

41.9 KB Created: 2020-08-24 01:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfd36454b8695ec4dafe8f991232095b SHA-1: 782ebbdee5a56360dd392f9d5c9ef5bd8276b6a6 SHA-256: bc48c902fd02fb5c0c9424bf87e255a65e527c1f7311bcffe5530667754401bb
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=create+apple+id+in+android+phone'. This URL is embedded within the document body, suggesting a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm heuristic further indicates malicious intent to distribute content or traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=create+apple+id+in+android+phone
    • http://files.randombutterflies.net/uploads/1/3/0/8/130873893/7689119.pdf
    • http://files.kkylambdapsi.com/uploads/1/3/0/8/130813934/8593321.pdf
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/67833196421.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/557966119.pdf
    • https://cdn.shopify.com/s/files/1/0428/8610/3207/files/sarevanima.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdf
    • https://cdn.shopify.com/s/files/1/0457/3698/4742/files/eclipse_ide_2019-_06.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9443/files/banalebenaxupidolilisek.pdf
    • https://cdn.shopify.com/s/files/1/0432/3613/0983/files/guarantee_certificate_letter_format.pdf
    • https://cdn.shopify.com/s/files/1/0437/8545/3728/files/21559816457.pdf
    • https://cdn.shopify.com/s/files/1/0437/3161/5909/files/pajuxasovasinumiguxutob.pdf
    • https://cdn.shopify.com/s/files/1/0435/1649/3976/files/vector_integral_calculus_problems_and_solutions.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_off000067db.bin
ac31610da2a7d8c0ac7f58f1c6a22d2a067660ea543e271b1f8d55cfb0bf947a
pdf-font-stream PDF embedded font (sfnt) at offset 0x67DB 4772 bytes
font_01_sfnt_off00007805.bin
aaaf61ab7f975ff82fb08815d7acef90c9b8a447ffdc0a21d38337fcf41afd55
pdf-font-stream PDF embedded font (sfnt) at offset 0x7805 10144 bytes