Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c94f96651c75bf…

MALICIOUS

PDF

43.3 KB Created: 2020-08-20 10:39:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cda4a82f13b2701a04bb14ce8770ccca SHA-1: 9bad8960208ab80e4c24539f0d4cf630721e50f4 SHA-256: 97c94f96651c75bfd52b6b0a16974572006e0a7c6114d50a102af6c49beb8a0c
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains text related to an 'adverbs modifying adjectives worksheet' and includes the malicious URL. This suggests a social engineering attempt to trick users into visiting a malicious site. The presence of many Shopify links, while mostly benign, is characteristic of SEO link farm techniques used to obscure malicious activity.

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=adverbs+modifying+adjectives+worksheet+with+answers
    • http://files.enterframework.com/uploads/1/3/2/3/132303382/visexan.pdf
    • https://cdn.shopify.com/s/files/1/0429/7749/3146/files/ffxiv_setting_up_act.pdf
    • https://cdn.shopify.com/s/files/1/0428/5100/8671/files/jupegusiveresoxuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/5897/8207/files/jimeta.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0987/files/fugijased.pdf
    • https://cdn.shopify.com/s/files/1/0432/4232/4125/files/mexenijisefufejitosi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5736/4638/files/84473383807.pdf
    • https://cdn.shopify.com/s/files/1/0430/1658/5379/files/78358915740.pdf
    • https://cdn.shopify.com/s/files/1/0434/2477/6354/files/lemikewez.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/9353471367.pdf
    • https://cdn.shopify.com/s/files/1/0440/6866/7542/files/interior_design_false_ceiling_home_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0438/1098/0000/files/format_of_descriptive_paragraph_class_9.pdf
    • https://cdn.shopify.com/s/files/1/0437/5651/9576/files/tegofoxejolodoliloteduv.pdf
    • https://cdn.shopify.com/s/files/1/0433/3315/7014/files/68173752825.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/tisexowisanab.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_off000059cf.bin
e3f5defb6fd16b0443daf7898344b114f311ec0152edfe1481b1d1b4243b0e18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59CF 3884 bytes
font_01_sfnt_off00006781.bin
25bd4efb104f8d9132cf311482412125c5e9c38b0f1474762cf3df9541bb02e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6781 5924 bytes
font_02_sfnt_off00007ba1.bin
fc3e3afef50876353562a03047534f29bb73f0272372eb26d9b917b19924d6e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA1 10436 bytes

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