Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a9927e462c525d0…

MALICIOUS

PDF

66.1 KB Created: 2020-08-23 22:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 456fb5e8818cb2b488ae39b557348085 SHA-1: 3a0c272b3604b82c6a9cdb1c97a567cc3bf0260e SHA-256: 1a9927e462c525d054c1f9699ad8c3bc2c7eb6c3a98ba078aec804419c7f323b
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a deceptive lure related to 'Java application server interview questions and answers' and includes a prominent link. This link, `https://ttraff.ru/pify?keyword=java+application+server+interview+questions+and+answers`, is identified as a malicious redirector. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on `cdn.shopify.com` but appear to be part of a SEO-based link generation scheme. The primary malicious activity observed is the redirection to a known malicious URL, likely to deliver a secondary payload or phish for credentials.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=java+application+server+interview+questions+and+answers
    • http://fepaxo.shamancellardoor.com/uploads/1/3/0/7/130738730/tadebeg_gikere_dopupuwivi_mavirudig.pdf
    • http://wafogo.custercadet.com/uploads/1/3/0/8/130874426/c556d2bc7d14e.pdf
    • http://files.balkanhistory.org/uploads/1/3/1/3/131384679/5414953.pdf
    • http://piwule.travelswithtom.com/uploads/1/3/0/7/130738615/kudiraj_rasidusum_fadexojoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/89078549757.pdf
    • https://cdn.shopify.com/s/files/1/0435/0256/7588/files/tugamevab.pdf
    • https://cdn.shopify.com/s/files/1/0431/6348/4315/files/anti_aging_herbs.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/jenonagatoremokipaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/retinoblastoma_usu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3939/0872/files/50534251201.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0201/files/kuzinuwun.pdf
    • https://cdn.shopify.com/s/files/1/0437/8814/0696/files/bisirokufum.pdf
    • https://cdn.shopify.com/s/files/1/0430/7124/2389/files/xamiran.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6580/files/intervalve_butterfly_valve_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0432/1620/8036/files/dibujo_tecnico_de_arquitectura.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/69083388904.pdf
    • https://cdn.shopify.com/s/files/1/0434/0298/5622/files/join_query_in_sql.pdf
    • https://cdn.shopify.com/s/files/1/0432/7935/1968/files/alexander_s_ragtime_band_sheet_music.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_off0000be24.bin
8b95d8f82e60f326079ecc5690d57adfff317af50ee4b960ac8619ed3589a279		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE24 5336 bytes
font_01_sfnt_off0000d05f.bin
3b96bb0657641b33bf979fdf3845b56b7c1e33c2d499dbf74a2a8a9da2044fa4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD05F 13072 bytes

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