Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f5802be0348a74e…

MALICIOUS

PDF

122.7 KB Created: 2020-08-08 22:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b27c71e4f75be129a9744ae84ab22ed0 SHA-1: e0798b9b96c40764d3573e5df3cfec68fff055f9 SHA-256: 4f5802be0348a74e866e354ad8d787bff5a5b86799a8dcb0fd9a5933d43acb6b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. This URL is presented within the document body, disguised as a link to "partnership fundamentals class 12 questions pdf". The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely for SEO manipulation to increase visibility. The ML classifier strongly supports the malicious nature of this PDF.

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=partnership+fundamentals+class+12+questions+pdf
    • http://bomid.ridgefieldfarm.org/uploads/1/3/0/8/130874474/zefenowonas_takuvefolowar.pdf
    • http://tamoselub.seewhy-designs.com/uploads/1/3/2/6/132683014/juminixubezodi-tetoz-vidafiditikep-vabavegalal.pdf
    • http://files.andreserpoosh.com/uploads/1/3/0/9/130969231/kojomigafir-dadutonorara-wesenimukanubew.pdf
    • http://fikupi.marianrichetta.com/uploads/1/3/0/7/130776486/bexapofufaraza.pdf
    • https://cdn.shopify.com/s/files/1/0428/4953/4111/files/watch_borat_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4071/files/kant_s_categorical_imperative.pdf
    • https://cdn.shopify.com/s/files/1/0433/3420/5590/files/suziw.pdf
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/mijoximafizuxuturav.pdf
    • https://cdn.shopify.com/s/files/1/0434/3654/0069/files/xaxejizabefewewodiru.pdf
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/redemption_manual_5._0_series_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/3556/5978/files/69118200010.pdf
    • https://cdn.shopify.com/s/files/1/0428/7932/0223/files/caliban_s_war_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/jenis_jenis_bioremediasi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1379/8050/files/42588719985.pdf
    • https://cdn.shopify.com/s/files/1/0433/0484/5465/files/14855038225.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/rogumupopozugo.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2939/files/2000_jeep_cherokee_owners_manual.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
font_00_sfnt_off000180cf.bin
6a0628f130dfd4b35b90a48f09f29f1c83fa45d5648016769915b0e4e5d9ff67
pdf-font-stream PDF embedded font (sfnt) at offset 0x180CF 5704 bytes
font_01_sfnt_off0001941b.bin
fb9cf9088c096ef873390aa8c81d52fd141db88e175ef55436a94cc68209a469
pdf-font-stream PDF embedded font (sfnt) at offset 0x1941B 16560 bytes
font_02_sfnt_off0001c76a.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C76A 16164 bytes