Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1d0a00d1cb6e3e…

MALICIOUS

PDF

51.7 KB Created: 2020-08-03 18:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ce79c1217dc11975b47829418260576 SHA-1: 649013c6b7ae6e0245cf5462cf00480e3e77f047 SHA-256: fd1d0a00d1cb6e3ef6afef5f703a00c521de2169e60efef2117e2ff384be8994
152 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 identifying a malicious redirector. The document body, though heavily obfuscated, contains text related to 'ignou assignment guru 2020 19 pdf' and the malicious URL, suggesting a lure for academic-related content. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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=ignou+assignment+guru+2020+19+pdf
    • http://files.campuscoxx.com/uploads/1/3/1/8/131857920/24194f8deec00.pdf
    • http://files.kayakingforcharity.co.uk/uploads/1/3/1/4/131453302/zizamajab-bodixalen-xusofidives.pdf
    • http://files.4us2wire.com/uploads/1/3/2/8/132814791/jejosaniw.pdf
    • https://cdn.shopify.com/s/files/1/0437/8220/9698/files/33873211679.pdf
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/jegutabuxid.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/iterm2_switch_panes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72163988246.pdf
    • https://cdn.shopify.com/s/files/1/0429/3872/8611/files/38863249859.pdf
    • https://cdn.shopify.com/s/files/1/0431/7164/3554/files/fibokovebujorowuxan.pdf
    • https://cdn.shopify.com/s/files/1/0434/0419/8044/files/46251112326.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/25408915213.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/papixusisijipe.pdf
    • https://cdn.shopify.com/s/files/1/0436/0011/7928/files/60118841484.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/wejulixefuwekakeli.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000586d.bin
0003ef1ec7db4f16e5a1f50ee40687d850d93e32b7793414102756bd37be7957		 pdf-font-stream PDF embedded font (sfnt) at offset 0x586D 5748 bytes
font_01_sfnt_off00006be7.bin
dfd849c7ba46648a108b3f87894f589838138b6f79a06510d1e20ed7330a249e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE7 9048 bytes
font_02_sfnt_off00008985.bin
900f82ffb23afd95d965af1470b3d32e669a065167eca8780ad0d2bd399e02ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8985 10080 bytes
font_03_sfnt_off0000ac48.bin
35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC48 16036 bytes

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