Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e00e715b9921171…

MALICIOUS

PDF

47.7 KB Created: 2020-08-22 09:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a2c218138d2f3a97a8a93d824e31a18 SHA-1: 133fcdfb5c59186cb16feb4558536798570367d5 SHA-256: 5e00e715b992117182dccf6e0c86de4117dec0f5fe9ef8672b232dbd1e61c3fd
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a link farm designed to host malicious content. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=ak+jain+physiology+pdf+volume+2'. The document body also contains this URL and other PDF links, suggesting a phishing or scam attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • 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=ak+jain+physiology+pdf+volume+2
    • http://files.thewarsoftherosescatalogue.com/uploads/1/3/1/0/131070051/fef7ff5848f26.pdf
    • http://nulet.chesterfieldfourseasonsclub.com/uploads/1/3/1/1/131164250/rizanek.pdf
    • http://files.travelingyoginista.com/uploads/1/3/1/4/131452867/88f12cd483fe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4908/2264/files/gajusenejusosa.pdf
    • https://cdn.shopify.com/s/files/1/0437/0271/4536/files/5199883506.pdf
    • https://cdn.shopify.com/s/files/1/0447/8697/4869/files/canterbury_tales_nun_s_priest_s_tale.pdf
    • https://cdn.shopify.com/s/files/1/0429/7709/9935/files/let_it_be_chords_piano.pdf
    • https://cdn.shopify.com/s/files/1/0432/6958/7104/files/behringer_neutron_patches.pdf
    • https://cdn.shopify.com/s/files/1/0447/7698/0629/files/68074550490.pdf
    • https://cdn.shopify.com/s/files/1/0432/0369/0660/files/career_paths_dental_hygienist.pdf
    • https://cdn.shopify.com/s/files/1/0433/4069/3662/files/47451941146.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9703/files/61194313141.pdf
    • https://cdn.shopify.com/s/files/1/0438/0160/8353/files/29514966738.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9871/files/knowledge_matters_vb_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0453/2423/9003/files/calligraphy_practice_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/3716/9576/files/palirufobanurobibowax.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3286/files/paint_the_town_red_game_android.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006443.bin
f0879b6b827780cf11473f859a65437fa8db7eccd25cd32c8d1caa4eaa122e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6443 5784 bytes
font_01_sfnt_off000077e5.bin
8fae9d54b8a280ba1a456492180212b9057786629cd65e06c5d6df452c089674		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77E5 10540 bytes
font_02_sfnt_off00009c22.bin
ee51351c9eb8c6a9dbff1bb743467f39bbaa64eee970481c040e8f02c1ffc4b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C22 16340 bytes

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