Malicious PDF — malware analysis report

Static analysis result for SHA-256 91b20e6291a1381c…

MALICIOUS

PDF

45.6 KB Created: 2020-08-17 04:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 381f29fbe85dcf359b2bf4b030beea26 SHA-1: e6f1defc4aa2ab497b123bab78b3c4de9b158580 SHA-256: 91b20e6291a1381cfeec8d93192566ab7b2ab56f363196d8d25b4672af06c497
128 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to domains that appear to be part of a link farm. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is presented as a download for an 'ebook reader android apk'. This suggests a social engineering lure to drive traffic to malicious sites. The document body contains obfuscated text and embedded URLs, further supporting the malicious intent.

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=ebook+reader+android+apk
    • http://tepulibux.ejhayesorchestra.org/uploads/1/3/0/7/130775085/af610708.pdf
    • http://jodedogew.lionsdenarms.com/uploads/1/3/1/4/131437919/mifibasubiz.pdf
    • http://files.thecuriouscatgiftshop.com/uploads/1/3/2/6/132681596/puwakir.pdf
    • http://files.southtownscatholic.org/uploads/1/3/1/6/131636990/3996155.pdf
    • http://sigotom.carpetcleaninghuntsville.com/uploads/1/3/0/7/130739732/kijopotaren-lafemedugupig-ziguzovof.pdf
    • https://cdn.shopify.com/s/files/1/0437/3128/8215/files/updated_periodic_table_2020.pdf
    • https://cdn.shopify.com/s/files/1/0446/9496/2332/files/mumozadosamidasodare.pdf
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/9258225155.pdf
    • https://cdn.shopify.com/s/files/1/0428/4927/1975/files/ssc_stenographer_practice_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/0131/5491/files/wakawudidelos.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/debupiwarokobazogisefof.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/68720325378.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/78085119517.pdf
    • https://cdn.shopify.com/s/files/1/0437/4849/1415/files/fuwefurukafegijesa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5219/files/manibatuxezogivo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2008/2590/files/257805311.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/xeduzotetesefefofovatan.pdf
    • https://cdn.shopify.com/s/files/1/0435/9208/9759/files/45794286264.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_off000068e3.bin
2ebfcccc4132af7e095f7509d376e0deb5bde60076a3f1144d75ef36db9edd66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68E3 4612 bytes
font_01_sfnt_off00007881.bin
e97689f61ff7f34aea64e3cdfead9a471c1c462aafc5ffd77826d52b177807dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7881 10204 bytes
font_02_sfnt_off00009b6a.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B6A 4324 bytes

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