Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b38a60c147606bd…

MALICIOUS

PDF

58.1 KB Created: 2020-08-11 21:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4392791bfb0ee896ff61cf7ce1626dae SHA-1: a5828b186d015060328c516cc68ebb5b0ea684e5 SHA-256: 9b38a60c147606bd98449282b3684f9bc3b6dc555d3911fd2ffef7dbbb93e202
128 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one prominent link pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=bhavani+ashtakam+pdf+telugu'. This indicates a likely attempt to lure the user to malicious content. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and click-through rates. The document body, though heavily obfuscated, also contains the malicious redirector URL.

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=bhavani+ashtakam+pdf+telugu
    • http://files.littlesprouts.org.uk/uploads/1/3/1/6/131606901/4368214.pdf
    • http://files.poringlandparishcouncil.gov.uk/uploads/1/3/1/3/131383424/2060172.pdf
    • http://sebaleju.theseasonalcollection.com/uploads/1/3/0/7/130738970/896423.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/69965530460.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/zawul.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5219/files/37165718743.pdf
    • https://cdn.shopify.com/s/files/1/0434/1379/9066/files/vehicle_sale_agreement_format_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/8529276382.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9069/files/27320047696.pdf
    • https://cdn.shopify.com/s/files/1/0435/2085/2122/files/tejonavumuwuzirutaza.pdf
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/5682739548.pdf
    • https://cdn.shopify.com/s/files/1/0435/7000/4126/files/egyptian_arabic_grammar_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/rukagujofir.pdf
    • https://cdn.shopify.com/s/files/1/0434/3755/5864/files/factorio_nuclear_bomb.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3112/files/39335045263.pdf
    • https://cdn.shopify.com/s/files/1/0431/3848/2332/files/likimogawez.pdf
    • https://cdn.shopify.com/s/files/1/0440/6083/6005/files/best_prot_paladin_legendaries.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000b65b.bin
c5031a25ad526bdbeb6a3bc7307a9091aae2be77992442864a48b4cb6eec97c3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB65B 10696 bytes
font_00_sfnt_off00006a9d.bin
d4b9bc59966cb3622bd1579fb21d4658c6e63eb7b249c92f51eac69da93724b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9D 5532 bytes
font_01_sfnt_off00007d4d.bin
4cd60777e265fafd80a6c4ac8a8f541642313e2b1c6670a3899fdf55b12f51bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4D 3772 bytes
font_02_sfnt_off000088f2.bin
04325eb1fafda12983dcc5bfe7b4588370d5315dc4fca3cefa9f4d50d3feab5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88F2 14608 bytes

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