Malicious PDF — malware analysis report

Static analysis result for SHA-256 159e2a99b4b2d89d…

MALICIOUS

PDF

42.8 KB Created: 2020-08-11 14:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49189198bd2c8f70dffbb8d02ce02cb5 SHA-1: 35f589cbb9186da6b7399b4ce5fe4e9dec043862 SHA-256: 159e2a99b4b2d89daf06dc1b1ed1d157a6b97f6855faf61195243763fd29ab54
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Pakistan budget 2020 pdf in urdu' and includes the malicious URL, suggesting a lure for users seeking this document. The presence of numerous other PDF links, many pointing to benign Shopify domains, indicates a link farm designed to obscure the malicious redirector. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link embedded within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=pakistan+budget+2020+pdf+in+urdu
    • http://viwoju.godinsmission.com/uploads/1/3/1/4/131454526/nuwato.pdf
    • http://files.honeyscider.co.uk/uploads/1/3/0/7/130776632/2277781.pdf
    • http://kugiru.gallantsbiocorner.com/uploads/1/3/0/7/130775934/newiguxaweveride.pdf
    • http://dijej.popideas.org/uploads/1/3/1/3/131398140/guxodenisumiz_dimugirajafivat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8493/8390/files/91505913387.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/kagetubitefumefijezovaxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7668/files/zobitoluzasa.pdf
    • https://cdn.shopify.com/s/files/1/0429/2483/4975/files/76058600851.pdf
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/descriptive_geometry_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/0279/6964/files/kofifageruju.pdf
    • https://cdn.shopify.com/s/files/1/0437/0087/9510/files/powivokatafekifenepov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/gazikarilote.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/duxunejetexuxiri.pdf
    • https://cdn.shopify.com/s/files/1/0431/0777/8717/files/mifomitenugavusiguxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.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_off00005f2c.bin
b2e427a244ecdf38e07ec1f439d4e727de5d25f51ba86cab805517a15c66305d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2C 5656 bytes
font_01_sfnt_off0000726b.bin
5f11a0989f7d692059854e5e9c1ee2ba9794b6ae7ee881d68276b42d6deff8ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x726B 14128 bytes

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