Malicious PDF — malware analysis report

Static analysis result for SHA-256 9adb5669fc2eedc1…

MALICIOUS

PDF

33.4 KB Created: 2020-08-09 20:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a46a95ee229f52958e066e38b4430dd SHA-1: 3010d9ab1f415df11b69dc2348e63fca3a08e0e9 SHA-256: 9adb5669fc2eedc100f8ad96e4d914c1f93f1ecda71ea7bf50591df30670af95
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=reproduccion+animal+aplicada+pdf`. The document body, though heavily obfuscated, also contains this URL and a large number of other URLs hosted on Shopify, suggesting a link farm designed to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=reproduccion+animal+aplicada+pdf
    • http://files.jmshairdesign.com/uploads/1/3/1/0/131070918/kadepepud.pdf
    • http://files.idstatement.org/uploads/1/3/1/4/131483592/1611273.pdf
    • http://files.anandalaketahoe.com/uploads/1/3/1/3/131398488/kedulot-tajaxuwezuvubi.pdf
    • http://files.sistersofhope.us/uploads/1/3/1/3/131398378/811e4213.pdf
    • http://files.centralorartawards.com/uploads/1/3/0/8/130813738/nalizogaxiguzeruf.pdf
    • https://cdn.shopify.com/s/files/1/0427/7351/2359/files/98528680434.pdf
    • https://cdn.shopify.com/s/files/1/0430/9126/3649/files/california_9th_grade_math_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/48384716811.pdf
    • https://cdn.shopify.com/s/files/1/0434/0908/0477/files/misuvosefu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/razarubaxe.pdf
    • https://cdn.shopify.com/s/files/1/0437/1401/9496/files/71927220227.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/bihar_board_10th_time_table_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3296/0409/files/facilities_and_equipment_of_arnis.pdf
    • https://cdn.shopify.com/s/files/1/0436/5231/7342/files/42430069557.pdf
    • https://cdn.shopify.com/s/files/1/0428/8564/4454/files/72515694490.pdf
    • https://cdn.shopify.com/s/files/1/0438/9008/1960/files/discord_emojis_list.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_off000045b6.bin
caa6ae750815b647608c5219533877edfa72287ea9086494ea72aee079307df3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45B6 5132 bytes
font_01_sfnt_off0000571d.bin
13dee56cbaf44d53591752a698c4aa45fc6b034f2d8752874e17325b30aa3d3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x571D 9808 bytes

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