Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af5950c486b5267…

MALICIOUS

PDF

43.6 KB Created: 2020-08-09 11:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0cd59ae1af71ecea0e4099a7c29bc83 SHA-1: b51e105e2e901c1957a118380b626aee9f0a33bf SHA-256: 2af5950c486b52671497246031bfff619f4189dc1d50fda66a442dcadc4e2e4b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with the primary malicious redirector identified as https://ttraff.ru/pify?keyword=significato+bandiere+nautiche+pdf. The document body, though partially corrupted, suggests a lure related to nautical flags, likely to entice users to click on the malicious links. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=significato+bandiere+nautiche+pdf
    • http://files.rebuildersspecialty.com/uploads/1/3/0/7/130776795/7ef163.pdf
    • http://files.msmagnosjcs.com/uploads/1/3/0/7/130740110/8213429.pdf
    • http://files.mattborengasser.com/uploads/1/3/1/4/131437770/313930.pdf
    • http://nuvaj.holycrossnm.org/uploads/1/3/0/7/130740141/5da9fae.pdf
    • https://cdn.shopify.com/s/files/1/0434/6957/0198/files/80300935306.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/wepepokulonalonevosivope.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/34160994684.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26965864763.pdf
    • https://cdn.shopify.com/s/files/1/0430/4440/5397/files/75947821988.pdf
    • https://cdn.shopify.com/s/files/1/0434/5410/3713/files/fariganijirot.pdf
    • https://cdn.shopify.com/s/files/1/0436/1804/2018/files/18740052113.pdf
    • https://cdn.shopify.com/s/files/1/0434/9971/6770/files/75818969864.pdf
    • https://cdn.shopify.com/s/files/1/0440/0067/3950/files/northrend_engineering_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/3203/4980/files/28869319236.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dubisetebezurazoxodo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9517/8902/files/national_electrical_safety_code_2012.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069df.bin
c19654b208175bb44bc39094b1dac9aefa314bd8b2c0f8658730258839d36018
pdf-font-stream PDF embedded font (sfnt) at offset 0x69DF 5448 bytes
font_01_sfnt_off00007c63.bin
daa4577ad0b2b804cce62b14bbf9a558c85ad7a901a59ee09fa59efbefd4729b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C63 11360 bytes