Malicious PDF — malware analysis report

Static analysis result for SHA-256 708d1ab0606a312e…

MALICIOUS

PDF

47.4 KB Created: 2020-08-07 05:37:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62f8902b4c2494a2af9b1aff2c9133be SHA-1: 4cbc07fcf586a73f5f3c07e78fbd28edb6fb94b8 SHA-256: 708d1ab0606a312e41575187605b3b7d9d3a6f9950ac6fd8882938b263b08553
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm designed to appear as a solutions manual download, but it redirects to malicious infrastructure. The primary malicious URL is https://ttraff.cc/pify?keyword=calculus+early+transcendentals+7th+edition+solutions+manual+pdf+download, which is flagged as a malicious redirector. The document body and embedded links suggest a phishing or scam attempt to drive traffic to malicious sites.

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=calculus+early+transcendentals+7th+edition+solutions+manual+pdf+download
    • http://files.centre5pinbowl.ca/uploads/1/3/1/4/131453198/4847870.pdf
    • http://files.inspireauthenticity.net/uploads/1/3/1/0/131070895/givivova-wizetiri-kavegotak-larubafoju.pdf
    • http://files.kimwilderanderson.com/uploads/1/3/1/4/131407855/7123954.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/91850637962.pdf
    • https://cdn.shopify.com/s/files/1/0437/8276/6750/files/mazemuxanezirowekopidem.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/fitoponutokebavofilawal.pdf
    • https://cdn.shopify.com/s/files/1/0429/3237/1622/files/vogegelor.pdf
    • https://cdn.shopify.com/s/files/1/0432/1997/6350/files/jaxunaxujadetivaket.pdf
    • https://cdn.shopify.com/s/files/1/0447/5827/0101/files/project_on_symmetry_in_maths_for_class_7.pdf
    • https://cdn.shopify.com/s/files/1/0429/4469/2383/files/fezilis.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/98807716129.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6100/files/32522571213.pdf
    • https://cdn.shopify.com/s/files/1/0430/8982/1845/files/pevetinafevozizupubox.pdf
    • https://cdn.shopify.com/s/files/1/0429/6451/7023/files/44317623651.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000620d.bin
e56f7e5a9cba85807a5486b2c66b906803a50d0f80b24531ac4101b16f9ba4a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x620D 5576 bytes
font_01_sfnt_off000074e9.bin
33d80b5e357abfa3ea91f5eff18928953f8e36d8e9a7aea158c838e8ae756dd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E9 2116 bytes
font_02_sfnt_off00007eb3.bin
7760a03dab1e09a0e942925c1eef3edb956e03eaa7ee5776dffcf5f9e8a98b12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB3 15156 bytes

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