Malicious PDF — malware analysis report

Static analysis result for SHA-256 f79b2af30302bd9b…

MALICIOUS

PDF

45.8 KB Created: 2020-08-20 07:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 723f0ee47afe626e1b2ebde0959d80e2 SHA-1: e3d7d67616ce13829fe562d5bac8ee33a8cbae2b SHA-256: f79b2af30302bd9bd6e2b834d424f0ddf29e2047f376567aa5534868410c2acd
128 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=google+chrome+mod+terbaru+apk'. This URL is presented within the document body, disguised as a download for an Android application. The PDF also contains a large number of embedded links, many hosted on Shopify, which is flagged as a link farm. The presence of a visual download button further supports the lure. No scripts were extracted from this sample.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=google+chrome+mod+terbaru+apk
    • http://files.newenglandpowerlight.com/uploads/1/3/0/8/130873979/2090d8f8018cfb2.pdf
    • http://boris.margolisphilosophy.com/uploads/1/3/1/4/131437361/52edf15d.pdf
    • http://merolo.camptesahe.com/uploads/1/3/2/6/132696067/b8b9c90.pdf
    • https://cdn.shopify.com/s/files/1/0429/7303/6697/files/kakaxufexedujamojasab.pdf
    • https://cdn.shopify.com/s/files/1/0431/7328/1948/files/65748290730.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80835258875.pdf
    • https://cdn.shopify.com/s/files/1/0429/8738/9087/files/tezolafetimotetuxubaziwus.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/a_level_chemistry_practicals.pdf
    • https://cdn.shopify.com/s/files/1/0440/1335/5166/files/43569882754.pdf
    • https://cdn.shopify.com/s/files/1/0448/1282/8833/files/abdominales_hipopresivos_rutina.pdf
    • https://cdn.shopify.com/s/files/1/0454/0868/2152/files/57075551799.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/kagog.pdf
    • https://cdn.shopify.com/s/files/1/0432/5444/8286/files/76695860425.pdf
    • https://cdn.shopify.com/s/files/1/0429/8522/6393/files/wirejomilajupoz.pdf
    • https://cdn.shopify.com/s/files/1/0452/4458/0002/files/kumekelixexatot.pdf
    • https://cdn.shopify.com/s/files/1/0437/8640/4000/files/nuwifuxelus.pdf
    • https://cdn.shopify.com/s/files/1/0437/0061/7381/files/aromaterapia_lavanda.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_off000073d4.bin
c90509b8cf7bd6129a096f1509c6fa602e5953f9f5b8df95ae9f65fbe42f1fca
pdf-font-stream PDF embedded font (sfnt) at offset 0x73D4 5544 bytes
font_01_sfnt_off00008684.bin
ee436514bb0576fbc804b3123fa7cd32f99febc63e0846c47a433576d6b4422c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8684 10536 bytes