Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3d3b542c38a47fc…

MALICIOUS

PDF

64.6 KB Created: 2020-08-23 12:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42fd2b46251def808af905f3ead1b3fc SHA-1: 55a65ccac463134bf4c9591447b0a2226b036607 SHA-256: a3d3b542c38a47fc37e9da3c6f39aeae41403446b3a2174d3b04ebbe8e56320f
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=business+mathematics+bcom+notes+pdf`. This URL is likely part of a phishing or scam campaign designed to lure victims into downloading further malware or visiting malicious sites. The document also contains a large number of external PDF links, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for malicious content. No scripts were extracted from this sample.

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=business+mathematics+bcom+notes+pdf
    • http://files.stannelibrary.com/uploads/1/3/1/1/131163712/xenudaxil-bagasonuzeku-rodunodofi.pdf
    • http://files.lowkeyinhighheels.com/uploads/1/3/0/9/130969489/zixaxemorujox-firad-guzudabet.pdf
    • http://files.budbarnyelm.com/uploads/1/3/0/7/130776211/wepuvomudaj_vikoxidosudij_bonimafovamit_vobuno.pdf
    • http://wobobe.nicoleforcouncil.com/uploads/1/3/1/4/131407440/1220912.pdf
    • https://cdn.shopify.com/s/files/1/0430/6635/9962/files/syndome_icon_800_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0459/1635/6757/files/bhole_ki_barat_dj_song.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6568/files/pudivovazivowemazo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8640/5022/files/english_to_spanish_translation_phrases.pdf
    • https://cdn.shopify.com/s/files/1/0432/3151/0690/files/54748200635.pdf
    • https://cdn.shopify.com/s/files/1/0448/1158/3645/files/gta_san_andreas_cheats_file_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8358/5949/files/sogujesomenelamo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7998/1470/files/all_nba_teams.pdf
    • https://cdn.shopify.com/s/files/1/0429/0124/2022/files/vemasirewakeliketupo.pdf
    • https://cdn.shopify.com/s/files/1/0461/9131/3059/files/gegaki.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4503/files/nudilar.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0805/files/biografia_de_anibal_barca.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079ab.bin
127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79AB 6744 bytes
font_01_sfnt_off00008a92.bin
8268b037154b3c41138a02307cb496140c3640a141ec64b3ad0af739b32a3221		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A92 5456 bytes
font_02_sfnt_off00009cde.bin
5e067315a2bd9524b6254977960f062bb129990ed69868068e29b4596197f3c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CDE 2320 bytes
font_03_sfnt_off0000a731.bin
3adf535085494bb6e33be0d058476f8c997fbb4a5d149cc961d74659e20da319		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA731 10516 bytes
font_04_sfnt_off0000cb23.bin
a349519ccbdbca3d75704c2becf615ab37801eb1543272228454131dceb83acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB23 16224 bytes
font_05_sfnt_off0000e0ac.bin
c0030b7aeb575edf6b83b95dd0683fc94b88c5334b171ea07442cdc7715cb969		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AC 5088 bytes

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