Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ddfafd5370e30c9…

MALICIOUS

PDF

50.1 KB Created: 2020-08-24 11:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 000978c36c44f75587944548c0f8d0cd SHA-1: cb661e3cc98fff76f030ff6463088a696905b66d SHA-256: 4ddfafd5370e30c9b611fb89d71afbcae4cdf783b867a8f9a85821cc8e3c2b27
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a malicious redirector link disguised as a 'messenger update apk ios' and also functions as a link farm, hosting numerous external PDF links. The primary malicious URL, https://ttraff.cc/pify?keyword=messenger+update+apk+ios, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains the same lure text and the malicious URL, reinforcing the social engineering aspect. The presence of a large number of external links, many hosted on Shopify, suggests an attempt to obscure the true malicious destination and potentially leverage legitimate platforms for hosting.

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.cc/pify?keyword=messenger+update+apk+ios
    • http://files.timepilgrims.com/uploads/1/3/0/7/130775309/gidobexa_xesikuw_nibejigesip.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/disejipapatodovir.pdf
    • https://cdn.shopify.com/s/files/1/0429/6212/4959/files/8811951420.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/6734147657.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/93345670841.pdf
    • https://cdn.shopify.com/s/files/1/0439/1829/5195/files/chapter_1_english_class_10_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5190/0310/files/kapinipakatejiladeku.pdf
    • https://cdn.shopify.com/s/files/1/0436/6699/7398/files/42767630345.pdf
    • https://cdn.shopify.com/s/files/1/0438/4319/0944/files/acca_reduced_subscription_form_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4831/files/bogetiwekopuvop.pdf
    • https://cdn.shopify.com/s/files/1/0428/7981/1750/files/wordly_wise_3000_book_8_lesson_6_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0435/4536/2581/files/nugezixofigirex.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1376/files/valomozuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/0226/4741/files/domid.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_off000070d2.bin
38269a1740ac29349f782089119852a718073d4d94398d74fa4683bc263051c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x70D2 5164 bytes
font_01_sfnt_off00008274.bin
8c905f2ff321802e99887d382be3c8250b6386dc99a89d20856735c96da787bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x8274 10308 bytes
font_02_sfnt_off0000a5f7.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5F7 16204 bytes