Malicious PDF — malware analysis report

Static analysis result for SHA-256 2782af096f0bdab2…

MALICIOUS

PDF

43.1 KB Created: 2020-08-09 01:37:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27428f660db59e1ec853168de8a9e7fc SHA-1: 68567d039506e0fc21015f39c942673d762721cf SHA-256: 2782af096f0bdab28cd2342294bc5ee15e90f13273e97700db37e861bdbc1ed0
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, includes text suggesting it is a lure for 'occupational safety and health notes pdf'. The primary malicious URL identified is https://ttraff.com/pify?keyword=occupational+safety+and+health+notes+pdf, which likely serves as a gateway to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.com/pify?keyword=occupational+safety+and+health+notes+pdf
    • http://texela.docegg.com/uploads/1/3/0/7/130776208/bibewulazasafamozopi.pdf
    • http://files.midlandsurgicalinstruments.com/uploads/1/3/1/4/131483098/2793398.pdf
    • http://files.salisburyadventistschool.org/uploads/1/3/1/1/131164130/salegox-magirul.pdf
    • http://files.acainhomecare.com/uploads/1/3/0/8/130874598/jixes_derelidedo_wogawo.pdf
    • http://files.fitmalahide.com/uploads/1/3/0/7/130776246/torufi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/xomivavo.pdf
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/bpmn_2._0.pdf
    • https://cdn.shopify.com/s/files/1/0434/6707/9830/files/45997886651.pdf
    • https://cdn.shopify.com/s/files/1/0434/1114/4861/files/beps_action_plan_13_final_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/4254/4533/files/apsc_exam_pattern.pdf
    • https://cdn.shopify.com/s/files/1/0431/0974/4789/files/voronizijunowomu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/zopofovitowijeli.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/apprentice_electrician_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/diramomo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/76480775743.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/furuvozaguz.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_off00006b8b.bin
cca043ab570f2d418f079fe412aef796a3acf4304383468b251ca665da8d69db
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8B 5276 bytes
font_01_sfnt_off00007d80.bin
2602591be9b52e530cd998dd796be7e4f64b5c003deae123578592127b70fa1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D80 9928 bytes