Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d4565e23cc2883c…

MALICIOUS

PDF

40.9 KB Created: 2020-08-05 03:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 925702b74465fa9ddb83d923176803d1 SHA-1: 1e311d51870589deddfb001e13b8bb477d141db1 SHA-256: 5d4565e23cc2883c6dbd6cff2699e324f82d22695ebb6167936fdef47b7e106b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or redirection scheme. The primary malicious link, 'https://ttraff.cc/pify?keyword=pan+card+cancellation+request+letter+format+pdf', is identified as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify links, reinforcing the lure of a 'Pan card cancellation request letter'.

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=pan+card+cancellation+request+letter+format+pdf
    • http://pizakev.ifixmarbella.es/uploads/1/3/1/4/131407233/pebeguwepew.pdf
    • http://lusowa.nobleneighbors.com/uploads/1/3/2/3/132303382/jiketi_selakapefox.pdf
    • http://padowiwum.crawcainellc.com/uploads/1/3/0/8/130874085/4254f27c472ed2.pdf
    • http://dugawudet.hartmangardens.net/uploads/1/3/1/4/131453574/4648288.pdf
    • http://files.ambrosehogan.net/uploads/1/3/1/4/131406140/2139473.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3631/0693/files/55077297958.pdf
    • https://cdn.shopify.com/s/files/1/0441/0084/5720/files/sunadakufex.pdf
    • https://cdn.shopify.com/s/files/1/0430/9093/5969/files/gotuxetulisupimepipobapu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0090/5380/files/56872692349.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/thyristor_controlled_rectifier.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/65651667208.pdf
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/bejitofipojotejasana.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/78226125907.pdf
    • https://cdn.shopify.com/s/files/1/0432/3246/0960/files/tepowobetemuxigosot.pdf
    • https://cdn.shopify.com/s/files/1/0437/7860/5210/files/vemekuvi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinubigelezegir.pdf
    • https://cdn.shopify.com/s/files/1/0434/6173/8662/files/sejarah_agama_kristen_di_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/90937090479.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_off00006184.bin
15a8b021d0638387c7b668a515355ab0efa6d4a1d5d68f60abfaccd3f8ed69aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6184 5428 bytes
font_01_sfnt_off000073e7.bin
979c059905da18b8bc5a678fccc1a6b52b618c57a089eb4c42dcca17f045afac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E7 10068 bytes

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