Malicious PDF — malware analysis report

Static analysis result for SHA-256 594adc7d6c2de777…

MALICIOUS

PDF

43.7 KB Created: 2020-08-17 00:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c5f2bdda13b2f07a6aaab2a3c2625de SHA-1: 57af15b6a684b78f40f9d7f72d4a8f28df8540b9 SHA-256: 594adc7d6c2de777859280547bf9086445584fef10349e89ce7cc20c4aacc40e
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used to lure users with search result-like content for educational materials. This redirector likely leads to a malicious payload or phishing page. No scripts were extracted from this sample.

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=cambridge+checkpoint+science+coursebook+9+free
    • http://files.yourfitnesschloeshea.com/uploads/1/3/1/4/131406604/zonube.pdf
    • http://files.lucamaumc.org/uploads/1/3/2/6/132681632/2809977.pdf
    • http://files.artinthebarndorchester.com/uploads/1/3/1/4/131406527/8851108.pdf
    • http://files.cherokeecountydemocraticparty.com/uploads/1/3/0/8/130813428/9530187.pdf
    • http://files.solidstatecircus.com.au/uploads/1/3/2/6/132696174/vikerituda_bapepa_puwadipigumug_fivoxiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/coldplay_yellow_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/51972304343.pdf
    • https://cdn.shopify.com/s/files/1/0434/0331/3315/files/headway_elementary_workbook_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/4664/8473/files/biopsychology_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/1814/9285/files/zadezatesatopokuxele.pdf
    • https://cdn.shopify.com/s/files/1/0438/8320/0680/files/70533919598.pdf
    • https://cdn.shopify.com/s/files/1/0428/8489/0790/files/karinafaxitimopokol.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/fipegisiferagos.pdf
    • https://cdn.shopify.com/s/files/1/0437/7319/8497/files/76086431329.pdf
    • https://cdn.shopify.com/s/files/1/0439/5096/4904/files/36610749895.pdf
    • https://cdn.shopify.com/s/files/1/0434/2241/7046/files/5891456770.pdf
    • https://cdn.shopify.com/s/files/1/0440/2295/6197/files/66603548205.pdf
    • https://cdn.shopify.com/s/files/1/0432/4232/4125/files/captopril_25_mg_bula.pdf
    • https://cdn.shopify.com/s/files/1/0434/3834/2311/files/bmi_calculation_formula.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3350/files/kebolixu.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_off00006b04.bin
9f7d6ee3a055f52ff0156cd3ceb8f6602f7d96f13c6b820d778c4a4ba8774a81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B04 5804 bytes
font_01_sfnt_off00007ea0.bin
ae47c81bf159e7cd77102464991f94adb822727ab10dcd4edae164d4148ec6ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA0 10036 bytes

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