Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f390372cf9d0f6…

MALICIOUS

PDF

47.0 KB Created: 2020-08-23 13:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d104661413e3671b3acf804b8da499d8 SHA-1: 02a346f27cd4b6076d4b64e44242e9b4b637bee2 SHA-256: e5f390372cf9d0f61e7d69124a6968b0fd096986f56fdc0e4804a40b0553db43
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=xerox+phaser+6510+user+guide', which is flagged as a malicious redirector. This suggests the PDF is designed to lure users to malicious sites, likely for phishing or to download further malware.

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=xerox+phaser+6510+user+guide
    • http://files.richlydwelling.com/uploads/1/3/2/7/132740274/1951073.pdf
    • https://cdn.shopify.com/s/files/1/0430/8123/6634/files/formulas_and_functions_in_excel_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/8993/6025/files/puisi_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0435/3441/8075/files/javafx_8_css_reference_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/2648/0295/files/vixenewutagu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/carson_dellosa_math_answers_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0429/9590/8761/files/diselexabuke.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/golalebilafofuzugetuvi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5833/9735/files/free_software_abbyy_transformer.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4664/files/funny_african_proverbs.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5157/files/2013_range_rover_evoque_owners_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b27.bin
22563b215f7e7bd302bbbc86fce36090979bf175ec7921f4dba01ec820f154b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B27 5400 bytes
font_01_sfnt_off00007d94.bin
3e135db8a45b9c7e058709837628bdc9d170db042e9465ad58a33ab564d66a7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D94 10428 bytes
font_02_sfnt_off0000a116.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xA116 4324 bytes