Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b312acc5e0195e1…

MALICIOUS

PDF

40.4 KB Created: 2020-08-18 15:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c587b18bad6f2679eaafa3013ab11c73 SHA-1: a499f255ee9880802bd46c2ab12050c067f57134 SHA-256: 9b312acc5e0195e1075b78a2a082afd6de4a6028bbf9b223e7f219f0b9d440e1
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to benign Shopify URLs but one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'https://ttraff.com/pify?keyword=betplay+apk+uptodown', indicating a lure for potentially unwanted software. The presence of a visual download button heuristic further supports the social engineering aspect of this attack.

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.com/pify?keyword=betplay+apk+uptodown
    • http://ziguxov.mrhansondai.com/uploads/1/3/1/3/131383483/zomotusuluped.pdf
    • http://nozuviweb.bennettcoffeeroastingcompany.com/uploads/1/3/0/7/130739723/taxijuxagamabe_mafobu_numedosikirib.pdf
    • http://files.gwensnewandused.org/uploads/1/3/1/0/131071056/6903685.pdf
    • http://vusirukab.angrypandanetworking.com/uploads/1/3/0/8/130874359/wuronidozug.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8196/files/tosojorosudo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0872/files/cub_cadet_lt1018_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/4722/2422/files/xedipuluw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/77389331849.pdf
    • https://cdn.shopify.com/s/files/1/0436/1859/9075/files/pafenozelusix.pdf
    • https://cdn.shopify.com/s/files/1/0427/5788/2022/files/xosunusofebikixuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2103/files/mogefobenazoluse.pdf
    • https://cdn.shopify.com/s/files/1/0435/8445/4817/files/meradovu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6966/9527/files/biblia_de_jerusaln_1967.pdf
    • https://cdn.shopify.com/s/files/1/0437/9466/1538/files/18381560523.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6161/files/application_of_artificial_neural_network_in_civil_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0428/9993/1295/files/87100042216.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_off00005f8a.bin
9e7ec5c0b8e0afb9502da21bc2c53211d8d999970d210870baa5fe7ca81efa62
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8A 4984 bytes
font_01_sfnt_off000070b0.bin
6e0033bbabdcc49882f07dabaafb1d60654f8c39b413d9e231599ada04f7c7ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x70B0 10636 bytes