Malicious PDF — malware analysis report

Static analysis result for SHA-256 542b757fb90305df…

MALICIOUS

PDF

53.2 KB Created: 2020-08-02 22:32:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c48d24972a072d0a3d45507055a974e3 SHA-1: 7889b47d909c03ce14fec52cda68ab009d22f58f SHA-256: 542b757fb90305df4e00c4d3fbc9ba5298cbf1dae7d45f9814f91daea40802de
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is likely used to obscure the final destination. The presence of a 'download button' heuristic further suggests a lure to trick the user into clicking these links. The reconstructed URL 'https://ttraff.cc/pify?keyword=javascript+discord+bot' is a primary indicator of 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=javascript+discord+bot
    • http://files.theburrs.org/uploads/1/3/0/8/130813768/9163218.pdf
    • http://files.thegivingvinethriftstore.com/uploads/1/3/1/3/131381109/xujakofojix-wisik-mafovoje.pdf
    • http://files.summitbuilders.us/uploads/1/3/1/4/131483603/sipowoboke_juvujo_sokunemidozukok_vojute.pdf
    • http://files.sacredhearts.ca/uploads/1/3/0/7/130739154/rutoj_motadelavavikeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pisanebemewamabojesodid.pdf
    • https://cdn.shopify.com/s/files/1/0429/6949/7753/files/66903623504.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/razawe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/nuliminoju.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tulajemo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/45552370163.pdf
    • https://cdn.shopify.com/s/files/1/0432/9252/4702/files/muzumukoralapawizode.pdf
    • https://cdn.shopify.com/s/files/1/0432/3521/3479/files/fodisirozomazipudezug.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/wurijafigofoxenujapodukov.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/70205173886.pdf
    • https://cdn.shopify.com/s/files/1/0433/6291/0376/files/rumezitevikixusovijebu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/kitapugerogiribudamada.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/49641957948.pdf
    • https://cdn.shopify.com/s/files/1/0437/3794/0133/files/zamulokoraleso.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/
    • https://cdn.shopify.com/s/files/1/0437/37

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006439.bin
5b881fb59904d40145bed6e29bd33160e540a728f07bba0105fa981a66812207		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6439 3244 bytes
font_01_sfnt_off00006fdd.bin
0e1d4193a1b14ac30255a332dd113041b8623b12793883ff0d12d8d8cd17483b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDD 4788 bytes
font_02_sfnt_off00008026.bin
5b20ff240a2647ba6269b7e547319320627847423b64979173a36e8424e421a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8026 10348 bytes
font_03_sfnt_off0000a3c7.bin
ac7c10de1015e18b761ae5a1b099de557794016c6d9db772ca757f8db2996f50		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3C7 16168 bytes
font_04_sfnt_off0000b8d9.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8D9 4324 bytes

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