Malicious PDF — malware analysis report

Static analysis result for SHA-256 875d6760eb93725d…

MALICIOUS

PDF

45.2 KB Created: 2020-08-21 11:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4686ba0156f84939cc03bfa6ffd97d2 SHA-1: 0648bf50af80e957df284646396dcb32a6e90167 SHA-256: 875d6760eb93725d026eafac8016e4174ab374496c9fa92c061d6fef7c4b33ba
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=weekly+maintenance+report+format'. The document also presents a visual download button lure, encouraging users to click through to the malicious infrastructure. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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=weekly+maintenance+report+format
    • http://karizobun.jademaxx.com/uploads/1/3/1/0/131070374/c6aaa841.pdf
    • http://files.bcwawomen.com/uploads/1/3/1/3/131384286/mulusolexamit-kiguro-napidetulu.pdf
    • http://files.toyourjoyaromas.com/uploads/1/3/1/4/131453177/werosonifukoz.pdf
    • http://files.travismarsala.com/uploads/1/3/0/7/130740191/6cb77d88c8df95a.pdf
    • https://cdn.shopify.com/s/files/1/0432/9593/2574/files/merafelofopugikakuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/chuyn_i_hnh_nh_tiff_sang.pdf
    • https://cdn.shopify.com/s/files/1/0430/9080/4893/files/2927489505.pdf
    • https://cdn.shopify.com/s/files/1/0434/6334/4280/files/lawezaliwafiragopup.pdf
    • https://cdn.shopify.com/s/files/1/0431/4192/2977/files/file_transfer_app.pdf
    • https://cdn.shopify.com/s/files/1/0437/8044/0213/files/cea_claim_form_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/10169716788.pdf
    • https://cdn.shopify.com/s/files/1/0438/3762/0381/files/64229987836.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/hibbeler_dynamics_12th_edition_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/7082/5382/files/noremifinutusuni.pdf
    • https://cdn.shopify.com/s/files/1/0431/5385/0524/files/asbabun_nuzul_bahasa_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0437/8676/4446/files/samugimu.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_off000072cf.bin
28c6cabe05e7e92dbbf8b8840ea0e5bd14cfbbbd1a9ac030cd033105e7ce976a
pdf-font-stream PDF embedded font (sfnt) at offset 0x72CF 5160 bytes
font_01_sfnt_off0000845c.bin
85a2a715daed2f0e6b1a55587b5f8d97da86a57e06bd68aaa2749eff923a6647
pdf-font-stream PDF embedded font (sfnt) at offset 0x845C 10416 bytes