Malicious PDF — malware analysis report

Static analysis result for SHA-256 63620fd8cbe062ce…

MALICIOUS

PDF

45.0 KB Created: 2020-08-21 06:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e671e2ec6874c1a9572fef1ca101635 SHA-1: 4894dd6dcf44f4140a27b0f960a2051dcaef458e SHA-256: 63620fd8cbe062ce1242eb3dba58e1e2f7f5e5b43c92ee17732088d15804041a
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as IELTS exam answers. The document body and embedded URLs suggest a phishing attempt to redirect users to malicious infrastructure. The presence of multiple Shopify URLs, some marked as benign and others unknown, indicates a potential attempt to blend malicious links with legitimate ones.

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.cc/pify?keyword=ielts+upgrade+8+listening+test+2+answers
    • http://rajobilan.lhseaglesbooster.com/uploads/1/3/1/6/131606490/zovozafogupit_sarifimedomodos_potewiweboga.pdf
    • http://nixej.jennypearlsboutique.com/uploads/1/3/2/8/132814930/f1309f8f3c4f3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5901/8919/files/convert_iso_to_img.pdf
    • https://cdn.shopify.com/s/files/1/0431/3907/2161/files/87683599647.pdf
    • https://cdn.shopify.com/s/files/1/0429/2296/7206/files/subazewe.pdf
    • https://cdn.shopify.com/s/files/1/0444/0326/1606/files/carbohydrates_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdf
    • https://cdn.shopify.com/s/files/1/0447/1455/7596/files/color_calibration_tool_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0438/2756/0610/files/chicago_manual_of_style_citation_generator.pdf
    • https://cdn.shopify.com/s/files/1/0428/4337/3735/files/fazonife.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/laborepowakilu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3364/7525/files/pijamuxakifodifata.pdf
    • https://cdn.shopify.com/s/files/1/0440/1247/0422/files/spelling_bee_words_5th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0433/7542/7735/files/29063777336.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070ac.bin
2d2cee3fbf46699b2195b240dca0194d4be82b93db13c05d119f4a515c1f75c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x70AC 5484 bytes
font_01_sfnt_off00008371.bin
7ccfa0e647d372cd9aba9c24a4512bb34761022a798b000c88254fdd854e3e11
pdf-font-stream PDF embedded font (sfnt) at offset 0x8371 10644 bytes