Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc8d3b6b757a292…

MALICIOUS

PDF

57.3 KB Created: 2020-08-21 11:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7801e1a21072710c59fb699454d57626 SHA-1: dc9ddaf05773b59f829d047eac2ac3ac61c0cf02 SHA-256: 7bc8d3b6b757a292f520a8f9d572f1d408901aba5635f3dee748d4d14cec24f9
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains a link farm and a malicious redirector URL, indicating an attempt to lead the user to harmful content. The document body, though partially obfuscated, contains the string 'blood donation app template' which is used in conjunction with the malicious URL. The presence of numerous embedded links and a critical heuristic firing for malicious redirector infrastructure strongly suggests a phishing or scam attempt.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=blood+donation+app+template
    • http://files.marylandmathematics.org/uploads/1/3/1/6/131606408/5606625.pdf
    • http://podag.tobrukbeef.com/uploads/1/3/1/4/131437987/e990a3b662.pdf
    • http://files.madamedrydensgrade5class.com/uploads/1/3/1/4/131407088/lutagotoru.pdf
    • http://files.cathywilmot.com/uploads/1/3/2/6/132681296/xokuxava.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/1055/4016/files/75265828065.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/buvodopozuko.pdf
    • https://cdn.shopify.com/s/files/1/0432/4366/7616/files/iptv_stalker-_rip.pdf
    • https://cdn.shopify.com/s/files/1/0434/1799/3366/files/u_bahn_plan_berlin_2020.pdf
    • https://cdn.shopify.com/s/files/1/0457/0470/8252/files/swap_rows_in_excel_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/ryan_ielts_writing_task_1_academic.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xigidewepiwunabifaw.pdf
    • https://cdn.shopify.com/s/files/1/0449/8276/3679/files/air_force_x_y_group_previous_year_question_paper.pdf
    • https://cdn.shopify.com/s/files/1/0436/3649/0398/files/gafaxelokavolebadixapuxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/73909494319.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006599.bin
cdadec829457ddceec73550af585e9301197d889b5236c6fc5662d339c323647		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6599 18296 bytes
font_01_sfnt_off00009f34.bin
e9561d47b41688c73973fa04a7f13c11e3733203090b1a09ac59fda2b9f96f1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F34 4880 bytes
font_02_sfnt_off0000afbe.bin
654a0760175ee9ec513b7ae14c5f278958c044813f64edde7d711f54922d06dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFBE 12280 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.