Malicious PDF — malware analysis report

Static analysis result for SHA-256 30168bffbc58d598…

MALICIOUS

PDF

45.6 KB Created: 2020-08-04 08:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b674032401749724d6a1f7e67796d3e7 SHA-1: cc479d16202409854b6256fcf0d9f7793b91851f SHA-256: 30168bffbc58d5986dc255f67ed3b1e075447a108e652054949408b7be58eb29
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves redirecting the user to potentially harmful external sites, as evidenced by the malicious URL found. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=amrutanubhav+granth+pdf
    • http://files.thegardenchild.com/uploads/1/3/1/4/131437636/lajifivimumopowaten.pdf
    • http://files.veniceconcertband.org/uploads/1/3/0/7/130738716/7974281.pdf
    • http://files.farmandgardencamp.org/uploads/1/3/0/7/130775025/8900653.pdf
    • http://files.columbapoetry.com/uploads/1/3/0/7/130739309/812cbd.pdf
    • https://cdn.shopify.com/s/files/1/0433/4593/6534/files/convert_degree_to_radian.pdf
    • https://cdn.shopify.com/s/files/1/0439/0069/8792/files/vokovesalipepilere.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/tovoxeluvuwakifikujoluno.pdf
    • https://cdn.shopify.com/s/files/1/0432/9232/8104/files/ruwitatigefovuri.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/drug_induced_megaloblastic_anemia.pdf
    • https://cdn.shopify.com/s/files/1/0438/7173/1880/files/gilokolawiweza.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/24993430721.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4632/files/67073575701.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/mojoki.pdf
    • https://cdn.shopify.com/s/files/1/0434/7111/0308/files/63124073592.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mekokagowofulagifofid.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/62735147230.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008b01.bin
b337cde2b36e639f60d133b12fb20604c0f5d60119c104b97330d02b206fc457
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8B01 9340 bytes
font_00_sfnt_off00005649.bin
31766e8338286f5a82be54fda95c2c84e6e6098ff2019ed1a28fb68a8b42fc2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5649 5436 bytes
font_01_sfnt_off000068a1.bin
1aa910b6ee1a7df1debe09be05684dfa93c67fb5892823abfeffc8a480eb1b01
pdf-font-stream PDF embedded font (sfnt) at offset 0x68A1 9976 bytes