Malicious PDF — malware analysis report

Static analysis result for SHA-256 832c165ddcc49fab…

MALICIOUS

PDF

68.9 KB Created: 2020-08-11 07:37:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab05597c8c34b007253cbcc8f1add2b9 SHA-1: a57af75f32e260259b6bc052a0ef742543decfd6 SHA-256: 832c165ddcc49fabd3624743dcd0ef631c2cc20bc01ec9505ae8374aecd6929f
128 Risk Score

Malware Insights

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

The PDF document contains a lure to download a novel, but the embedded link redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF_SEO_LINK_FARM heuristic further suggests this is part of a larger campaign distributing malicious links. No scripts were extracted from this sample, limiting the ability to determine the exact payload.

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=download+novel+hunger+games+bahasa+indonesia+pdf
    • http://files.yorktonfarmersmarket.ca/uploads/1/3/1/8/131857580/2630053.pdf
    • http://files.lperfumeriallc.com/uploads/1/3/2/3/132303013/manuvegawod-gumolunupevoto-lulat.pdf
    • http://files.jpsousanhsband.com/uploads/1/3/1/8/131871786/godiseraviduzimumuw.pdf
    • http://files.5degreespsychotherapy.com/uploads/1/3/1/4/131454221/8b14fd1e06.pdf
    • http://files.hccbillings.org/uploads/1/3/1/3/131398100/fuxejirevizigoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/1251/4201/files/ritiremujese.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/88113577830.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7670/files/dosesof.pdf
    • https://cdn.shopify.com/s/files/1/0433/6173/0719/files/90809904764.pdf
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/causes_of_addiction.pdf
    • https://cdn.shopify.com/s/files/1/0435/0679/4656/files/case_study_marketing.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3349/files/destination_unknown_song.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/pafolitazilemeje.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8397/files/jaloregozasifesimanazep.pdf
    • https://cdn.shopify.com/s/files/1/0432/3590/1602/files/56358198972.pdf
    • https://cdn.shopify.com/s/files/1/0429/9427/0371/files/guvalepevipi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0781/8398/files/python_capitalize_first_letter_of_each_word.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_off0000cf8b.bin
22dcda085a73b327e742bf9c594a71090294bd3f0586bec7cd58d55d85513ae4
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8B 5744 bytes
font_01_sfnt_off0000e300.bin
38868212fdab3360499fe9943e93cdc85ab848c5e89814c71b4bed1892acbaee
pdf-font-stream PDF embedded font (sfnt) at offset 0xE300 10316 bytes