Malicious PDF — malware analysis report

Static analysis result for SHA-256 316b1b3fee503890…

MALICIOUS

PDF

40.9 KB Created: 2020-08-25 04:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1e11c03680bdc90d7024848ea7b3213 SHA-1: bb32a6c1f2e701950fa3f46d01bc2118aeb8c273 SHA-256: 316b1b3fee5038907465b9c92924d28b97f14b1b85de03d43490b551795c709b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=adb+driver++for+windows+8'. This URL is presented within the document body as a lure for an ADB driver download. The PDF also contains a large number of embedded links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or distributing malicious content. The ML classifier strongly flagged this PDF as malicious.

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=adb+driver++for+windows+8
    • http://files.friendsofmargampark.co.uk/uploads/1/3/1/0/131070581/9596977.pdf
    • http://pevusijug.lombardyreview.com/uploads/1/3/1/4/131438641/9dff75.pdf
    • http://files.gsgotclass.com/uploads/1/3/0/7/130776262/todosigemuf_fubaxumaxuwewo_filiwirakixumef.pdf
    • http://files.marisalivetbooks.com/uploads/1/3/0/8/130874162/cab2a2d50de71.pdf
    • https://cdn.shopify.com/s/files/1/0428/7738/6911/files/vojajifepivipiwixijob.pdf
    • https://cdn.shopify.com/s/files/1/0430/7625/5897/files/82805607068.pdf
    • https://cdn.shopify.com/s/files/1/0431/4352/8609/files/46520598113.pdf
    • https://cdn.shopify.com/s/files/1/0430/1311/1961/files/38562988165.pdf
    • https://cdn.shopify.com/s/files/1/0435/5319/4133/files/adobe_converter_download_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/minecraft_brick_recipe.pdf
    • https://cdn.shopify.com/s/files/1/0434/6744/0290/files/26342180674.pdf
    • https://cdn.shopify.com/s/files/1/0432/8872/3616/files/76139668640.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9566/files/ap_grama_sachivalayam_notification.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/72311098329.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3118/files/julozim.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9380/files/lodom.pdf
    • https://cdn.shopify.com/s/files/1/0441/4259/2152/files/printable_fractions_worksheets_for_2nd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuwuvedalolavotidexetugom.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_off000061f2.bin
ffeaafbdc9104c8c37ab10056295e182467b7e037009651deaa5ef3b7ab7f670
pdf-font-stream PDF embedded font (sfnt) at offset 0x61F2 5136 bytes
font_01_sfnt_off00007395.bin
ade1b1a8042b636a811f98b5cd341a256995dba31e9ed4a0368979ed3e3e5763
pdf-font-stream PDF embedded font (sfnt) at offset 0x7395 10232 bytes