Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f24b52222a51a5…

MALICIOUS

PDF

40.5 KB Created: 2020-08-19 04:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 690188729bd0c200dbd5a4d54758535d SHA-1: 34177b3d8ed4d3fc22a298af715d89d3eb5d30e1 SHA-256: 07f24b52222a51a511c95c06dc0f387b0f69437ca759985e25b675e96d194c55
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. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to lure the user to a harmful site, likely for further exploitation or credential harvesting. No scripts were extracted, but the presence of malicious links is sufficient evidence of a phishing attempt.

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=bechem+presec+uniform
    • http://tawemof.childdevelopmentshs.com/uploads/1/3/1/1/131164392/1405238.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/simple_english_words.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/75703008933.pdf
    • https://cdn.shopify.com/s/files/1/0434/3418/0769/files/39553143389.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3845/files/notibara.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7742/files/barrier_option_pricing.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4367/files/catalogue_schneider_electric_automatisme_et_controle.pdf
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/62516814019.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/54933404230.pdf
    • https://cdn.shopify.com/s/files/1/0429/2729/2582/files/classroom_management_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0428/4930/4732/files/zewako.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003ff7.bin
93ab4b2ef4935d5f92e5951036d32362cf36beb372b9a796a00b1743304965b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3FF7 5060 bytes
font_01_sfnt_off00005105.bin
23d8b194761c2e10892891382b72236fb744d90e28fca9efb2bc823c1016ac53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5105 4852 bytes
font_02_sfnt_off00005ed4.bin
34414aee5202b7cbbcb2beb0ac7c73d06a0ee361ed0b1ced00922b3b40260c74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED4 9764 bytes
font_03_sfnt_off00008071.bin
52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8071 16036 bytes

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