Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6c1e0194ba4a27…

MALICIOUS

PDF

48.9 KB Created: 2020-08-08 08:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c64b7a4a7a1b65514be13b490824374 SHA-1: dbc9a5ad269831d3fc87ea6ce088f7b2389da475 SHA-256: 7d6c1e0194ba4a27d0c71fe46c04cbbcff4a0676c1fd8ef2f71c45000239b3bd
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=abrsm+piano+grade+1+pieces+pdf', which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains text that appears to be a lure for educational materials, further supporting the malicious redirector's purpose. The ML classifier also strongly indicated maliciousness.

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=abrsm+piano+grade+1+pieces+pdf
    • http://files.daniel12.com/uploads/1/3/2/6/132682585/21c62e.pdf
    • http://files.metrovinyl.co.uk/uploads/1/3/0/7/130738919/8b79e9.pdf
    • http://files.thegriffithgalleryonline.com/uploads/1/3/1/4/131453395/2952941.pdf
    • http://files.shopnorae.com/uploads/1/3/1/4/131483281/9710002.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99231100330.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9639/files/locus_score_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/5190/8249/files/55653843170.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/nurumujas.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8083/files/89217504437.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4342/files/jatasikenatexogagajogasev.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8125/files/abdomen_agudo_inflamatorio_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/xogepekuvudabotogel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/razikeruranofe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/nobodunelesukuneribani.pdf
    • https://cdn.shopify.com/s/files/1/0432/9567/0432/files/83589772418.pdf
    • https://cdn.shopify.com/s/files/1/0434/6177/1430/files/the_wiley_handbook_of_contextual_behavioral_science.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_off000080ba.bin
4f47c429f24bcaab97449ced35a7ff772bf2940fbf91852ee907b90eb2a9dc3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80BA 5624 bytes
font_01_sfnt_off000093c5.bin
66a3142c0c65f8b456c56613f3c88f8e906837ac2b46356a8a0b898e3199df1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93C5 10288 bytes

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