Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a8e1763b37accb4…

MALICIOUS

PDF

50.7 KB Created: 2020-08-21 04:14:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9eaac89f11fd19d28e446ae0172ced9 SHA-1: bbfff5f500b8af5f67b76e51a63d1b52be8b0e4d SHA-256: 3a8e1763b37accb414aa7b6a57bfadd26bca70174ebddf366936cdcbd332ceff
130 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains text referencing 'play android apps on linux' and includes the malicious URL. This suggests a social engineering lure to redirect the user to malicious infrastructure. No scripts were extracted, limiting the analysis of further payload delivery.

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.cc/pify?keyword=play+android+apps+on+linux
    • http://files.newhavenhomesco.com/uploads/1/3/0/7/130738836/razebozu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7001/3086/files/69832444067.pdf
    • https://cdn.shopify.com/s/files/1/0434/3277/1750/files/59445506695.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8327/files/fedanej.pdf
    • https://cdn.shopify.com/s/files/1/0439/1868/8424/files/gevolilomifofu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/ielts_answer_sheet_sample_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/sting_brand_new_day_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0435/7373/9675/files/aula_anemia_falciforme_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/40280347928.pdf
    • https://cdn.shopify.com/s/files/1/0439/2180/1371/files/46396113524.pdf
    • https://cdn.shopify.com/s/files/1/0432/8328/4136/files/how_do_i_markup_a_on_my_ipad_pro.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/xixoserasela.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_off00007b18.bin
0149c5f754f744dea02de94100a60b4cb1b4d478f7cca5bdbe554fe159887f75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B18 4808 bytes
font_01_sfnt_off00008b69.bin
ed28e45ded50e06e853e44dacdf6f804a152942a3391c65f2450a030f22c177f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B69 10684 bytes
font_02_sfnt_off0000b006.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB006 4324 bytes

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