Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b82b9effe741403…

MALICIOUS

PDF

34.0 KB Created: 2020-07-31 23:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3feb6961468e236db8a3a7572960f25 SHA-1: d828554905c03f163155c596bdd700bd4b051c95 SHA-256: 9b82b9effe7414038771c510fb6594567a1e18ea2db6f3d6313702561451d03d
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=valentinos+harford+road', which is flagged as malicious. The presence of numerous external links, many hosted on Shopify, suggests a link farm used to distribute malicious content or facilitate phishing. No scripts were extracted from this sample.

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=valentinos+harford+road
    • http://files.getfitwithcharlie.org/uploads/1/3/0/7/130775813/8890915.pdf
    • http://files.kidbookreviewer.com/uploads/1/3/1/1/131163833/powafetelamov_negolawo_vodezen.pdf
    • http://files.floweredconcrete.net/uploads/1/3/0/7/130775050/pukuretatuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/6960/2978/files/57999590944.pdf
    • https://cdn.shopify.com/s/files/1/0431/6820/2901/files/70238866983.pdf
    • https://cdn.shopify.com/s/files/1/0434/0537/7701/files/weruvaxoruxetido.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/sopizuwonesopegex.pdf
    • https://cdn.shopify.com/s/files/1/0440/0598/2366/files/kizebi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/24900857039.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/87154444168.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/93900252014.pdf
    • https://cdn.shopify.com/s/files/1/0430/7930/3317/files/83787632253.pdf
    • https://cdn.shopify.com/s/files/1/0428/7492/9319/files/soxejumeli.pdf
    • https://cdn.shopify.com/s/files/1/0435/9048/4131/files/66558063807.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_off00004799.bin
eb31da1de4a8b0351b71c42b7f525627926eca41bd30d1e10a8887d55f950a10
pdf-font-stream PDF embedded font (sfnt) at offset 0x4799 4960 bytes
font_01_sfnt_off0000586c.bin
005dce27629d7382c30a051fc51d6a70de8fc7fee74f88d4cd414dbefed8bc89
pdf-font-stream PDF embedded font (sfnt) at offset 0x586C 10360 bytes