Malicious PDF — malware analysis report

Static analysis result for SHA-256 07bc24d0de325f4d…

MALICIOUS

PDF

35.6 KB Created: 2020-08-19 07:40:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 389b9b7bb0fef2f54bc3a406edf03da8 SHA-1: 5d2174bcba17cfab9eec2255c6eec09b5ba3598e SHA-256: 07bc24d0de325f4d8e188af051f4ae05208c547ae4e39b0ae80e7a0c802131bd
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=anywhere+usb+software'. The document body, though heavily obfuscated, contains references to 'Anywhere usb software' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=anywhere+usb+software
    • http://files.bundabergcofc.org/uploads/1/3/0/7/130739593/b0afe8ba80c.pdf
    • http://fanim.sascrunchtraining.com/uploads/1/3/1/4/131453068/sebewejopemikef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/2153/9240/files/margaret_atwood_alias_grace.pdf
    • https://cdn.shopify.com/s/files/1/0436/4258/5241/files/bozorg_alavi_her_eyes.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/zezepul.pdf
    • https://cdn.shopify.com/s/files/1/0434/7058/6022/files/iron_deficiency_anemia_symptoms.pdf
    • https://cdn.shopify.com/s/files/1/0428/5438/3782/files/potofebazuba.pdf
    • https://cdn.shopify.com/s/files/1/0437/8145/6023/files/common_adjectives.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/65092084714.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/29085841893.pdf
    • https://cdn.shopify.com/s/files/1/0434/4768/1181/files/difumegikasonutisumavew.pdf
    • https://cdn.shopify.com/s/files/1/0434/5574/2114/files/zonetupovukogaka.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/nejelujufinukedikoledex.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4827/files/29128745749.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/46405519753.pdf
    • https://cdn.shopify.com/s/files/1/0436/2030/3011/files/zefek.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cc1.bin
de41ec78a6e68de7fc8291cd1c9a6c4ed5cc78bdb0710ff4756b0f29ca3981d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CC1 5148 bytes
font_01_sfnt_off00005e48.bin
3d46aad33b595d7e55b37cabb9abca6a22ca5cf584a0270c46a9101136bd0f51
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E48 9972 bytes