Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e48d9343a6dc50e…

MALICIOUS

PDF

35.9 KB Created: 2020-08-11 14:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8994ab6ae7950cff1750fd1ab2e33814 SHA-1: 9ccb3ff3a0d3e7f541164789178626b45b216c70 SHA-256: 6e48d9343a6dc50e62ecbd73e05549babb1333b61e8fbfa57ce296719de00ee9
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=convertir+de+pdf+a+word+small'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs. The presence of a 'download button' lure further supports a phishing or social engineering attack vector.

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.cc/pify?keyword=convertir+de+pdf+a+word+small
    • http://files.calvinnyecomics.com/uploads/1/3/0/8/130874295/magabobif.pdf
    • http://baguxe.shore2shoretravel.com/uploads/1/3/0/7/130776046/temivirakinol_gowokivu_kujaku.pdf
    • http://files.pgridigitallibrary.com/uploads/1/3/0/8/130874317/8687012.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/fefobetofusowuwixet.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7106/files/cantilever_building_structure.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/kutesapeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/83849157957.pdf
    • https://cdn.shopify.com/s/files/1/0440/9714/2936/files/bioremediation_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/nidujevabibiba.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/todadufaliwiwazir.pdf
    • https://cdn.shopify.com/s/files/1/0428/1666/7815/files/aspergillosis_in_birds.pdf
    • https://cdn.shopify.com/s/files/1/0436/6955/3305/files/fft_algorithm_c.pdf
    • https://cdn.shopify.com/s/files/1/0428/5598/9404/files/falawa.pdf
    • https://cdn.shopify.com/s/files/1/0429/7303/6697/files/python_multiprocessing_example.pdf
    • https://cdn.shopify.com/s/files/1/0429/3358/4028/files/11022167853.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/administrative_officer_question_paper.pdf
    • https://cdn.shopify.com/s/files/1/0449/5107/7032/files/samimem.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_off00004dd1.bin
3916db2f14ef7724cfce59826c65e8665939fc8fd2934a6d1049bb987b3b643a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DD1 5244 bytes
font_01_sfnt_off00005fa1.bin
bd27f0cd0a0ac23e2c384fdf232fbb163e3f8c2f48ccdbb55bb72598a49d1486		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA1 10252 bytes

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