Malicious PDF — malware analysis report

Static analysis result for SHA-256 aedd20f3bf89c2de…

MALICIOUS

PDF

40.6 KB Created: 2020-08-07 08:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d3afadde65a51b4c5cc3ea848e26ae6 SHA-1: 8e58bdbcdb9cb744dace8524acb56dfe76227870 SHA-256: aedd20f3bf89c2def5dcaaeac3223f8b1b0ff6e509a451b28ebd172a335f0a94
150 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, embedding a large number of external URLs. One of these URLs, 'https://ttraff.ru/pify?keyword=missing+addend+worksheets+2nd+grade+pdf', is flagged as a known malicious redirector. The document's content and structure strongly suggest an attempt to manipulate search results or redirect users to malicious content, rather than providing legitimate information.

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=missing+addend+worksheets+2nd+grade+pdf
    • http://files.freemanyouthservices.net/uploads/1/3/0/9/130969695/kilexeda.pdf
    • http://vekapigo.thelaurenwalker.com/uploads/1/3/1/4/131453278/remuli_babugeji.pdf
    • http://files.hotrodtrailersales.com/uploads/1/3/0/7/130776180/6cf01e5c5e91.pdf
    • http://siwixi.tablewinemerchant.com/uploads/1/3/1/0/131071164/9018885d3d65c.pdf
    • http://files.bsascouts800.com/uploads/1/3/1/6/131636891/5282898.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xizijifopaxefiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/magamazatilojiwifemux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48466687054.pdf
    • https://cdn.shopify.com/s/files/1/0440/6588/2277/files/animator_s_survival_kit_by_richard_williams.pdf
    • https://cdn.shopify.com/s/files/1/0429/7300/3939/files/fancy_reba_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/7554/2950/files/wakevanirolasawibaxixukel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0103/files/sufufixizakatogazikuwiba.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/gorakaweborodeduku.pdf
    • https://cdn.shopify.com/s/files/1/0428/3862/2375/files/zusazonusofopizefo.pdf
    • https://cdn.shopify.com/s/files/1/0439/1672/2344/files/vovej.pdf
    • https://cdn.shopify.com/s/files/1/0437/0091/2283/files/silent_hill_endings.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2053/files/88054970938.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_off00005e80.bin
85e00b676e4726bde4097f6b9a8368aef90c24b5fcf469a3e5063f400a260c4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E80 5564 bytes
font_01_sfnt_off0000718b.bin
433383c8dcce29b46c53a4cfe37b20f2cd3332882228b2f8a2d91b5585cba9dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x718B 10448 bytes