Malicious PDF — malware analysis report

Static analysis result for SHA-256 888d368ef595d7b9…

MALICIOUS

PDF

45.1 KB Created: 2020-08-19 11:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46bbffaca527e69baa47c15f1887619c SHA-1: 833a20b004bc8d739d44ef180a664dac95ca1ac4 SHA-256: 888d368ef595d7b9c3383d30381db05a1f6e3e2f25dce93d1586a9a0fd0f0f9c
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, but one critical link to `ttraff.ru` which is flagged as a malicious redirector. The document body also contains the URL `https://ttraff.ru/pify?keyword=bkash+app++now`, suggesting a lure related to a financial app. The presence of a download button lure further supports the malicious intent. The file is likely a downloader or phishing document.

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=bkash+app++now
    • http://files.elizabethzevin.com/uploads/1/3/0/9/130969632/kasezazedaji.pdf
    • http://files.bombalastreetsurgery.com/uploads/1/3/2/7/132740249/tokorutasa-belulubana-zarulovogu-xajumaputaruxok.pdf
    • http://files.letspaintarabic.com/uploads/1/3/1/3/131379612/22ab9b14a11.pdf
    • http://files.wakefieldperformingarts.com/uploads/1/3/1/4/131437423/b65388ebed.pdf
    • http://pusasevu.thescisquad.com/uploads/1/3/0/8/130813325/dogedatuvogogerawo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3420/5590/files/american_airlines_receipt.pdf
    • https://cdn.shopify.com/s/files/1/0432/5320/3102/files/62612641698.pdf
    • https://cdn.shopify.com/s/files/1/0433/9138/5758/files/picture_frame_design_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/6971/0241/files/wedding_march_easy_piano.pdf
    • https://cdn.shopify.com/s/files/1/0431/9484/3293/files/jasper_reports_tutorial_beginners_eclipse.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/gulowa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4818/9595/files/18778501225.pdf
    • https://cdn.shopify.com/s/files/1/0428/8076/2023/files/givumamilobakosazozejarat.pdf
    • https://cdn.shopify.com/s/files/1/0435/9825/0146/files/bishop_horntail_guide.pdf
    • https://cdn.shopify.com/s/files/1/0453/5720/3611/files/error_handling_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0439/6518/6206/files/diwilenowasumaxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9868/6111/files/68698288199.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_off000074ca.bin
90006c71f843af79826ec708541501d36e03bf4bcfc461b15ecc8f96501d7575
pdf-font-stream PDF embedded font (sfnt) at offset 0x74CA 4984 bytes
font_01_sfnt_off000085cd.bin
43d77f3dbeca715e9796f34c3e785f344d01838f4b27301fd409b7d78f4335a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x85CD 9896 bytes